NOTE: I am going to add this. Even if your name isn't registered with a government official, it doesn't mean your lineage didn't come up with a Coat of Arms for their name.
http://thelibrary.springfield.missouri.org/faq/files/lhcofh.cfm
http://www.audioenglish.net/dictionary/coat_of_arms.htm
NOTE: Don't feel bad because of the Coat of Arms you have tattoed on yourself. Wear it proudly. It still has meaning to you.
Just keep this in mind. While the laws in the United States are nonexistent when it comes to Coats of Arms, other countries have laws (inparticular Scotland) regarding bearing Coats of Arms that don't belong to you specifically.
So, if you are ever planning on traveling to Sweden, find out what the laws are there for Coats of Arms and, if necessary, cover them up while traveling abroad.
If you want to get more direct information on your lineage, you can take a Y-DNA test.
A Surname Project traces members of a family that share a common surname. Since surnames are passed down from father to son like the Y-chromosome, this test is for males taking a Y-DNA test. Females do not carry their father's Y-DNA and acquire a new surname by way of marriage, so the tested individual must be a male that wants to check his direct paternal line (father's father's father's...) with a Y-DNA12, Y-DNA37, or Y-DNA67 marker test. Females who would like to check their direct paternal line can have a male relative with this surname order a Y-DNA test. Females can also order an mtDNA test for themselves such as the mtDNA or the mtDNAPlus test and participate in an mtDNA project
http://www.familytreedna.com/test-descriptions.aspx
Here is a link to question I have given a answer to already when it comes to Coats of Arms. This is just in case you are a purist when it comes to matters such as these.
https://answersrip.com/question/index?qid=20090906121805AASOgNn&show=7#profile-info-uajWatCBaa
NOTE: While I agree with everyone and so does the website that I have listed that sells Coats of Arms itself backup what everyone is saying, you are looking for an answer to your question.
So, to directly answer your question, here is what I have found out (I will look for more information and update as I find more out).
star
A star depicted on a coat of arms, in some cases, may represent a falling star and denote a divine quality bestowed from above, whereby men shine in virtue like bright stars on the earth. The star symbolizes honor, achievement and hope. Stars with wavy points are emblems of God's goodness, or some other eminence that elevated the first bearer above the common people. Stars, estoiles and mullets are often confused because of their similarity, which is not helped by the fact that no definite lines have ever officially been followed regarding their specific differences. In England stars with wavy rays are called estoiles, when they are straight they are called mullets, and technically there is no such thing as a star. A mullet has five points unless another number is specified, which it often is, but an estoile can have any number so one must be provided. However, in Scotland the distinction between a mullet and a star is that a mullet is pierced, which actually makes it a spur-revel, and a star is whole. In France the definition of a mullet is different yet again; this time, it has no less than six points
http://www.houseofnames.com/xq/asp/keyword.star/qx/symbolism_details.htm
Star (estoile or mullet) Celestial goodness; noble person; Excellence--http://www.fleurdelis.com/meanings.htm
So, since you already have this particular Coat of Arms tattoed on you, go ahead and integrate the meaning of the stars into it unless, after reading everything everyone has posted in regards to your question, you have a change of heart and don't want to disrespect someone else's Coat of Arms.
Now, if you should decide to find out the lineage of your family to see the if there are any recorded records of Coats of Arms, that can get quite expensive.
I have included this link for AAG, Inc.--http://www.intl-research.com/surname.htm
This is a link to a website that sells Coats of Arms. This particular link is of the Peterson name from Sweden.
http://www.thetreemaker.com/family-coat-p/peterson/sweden2.html
This is question #3 & 4 from the FAQ section from the same company that sells this Coats of Arms.
http://www.thetreemaker.com//faqs.html
3.How do I know this is the right coat of arms for my surname?
The coat of arms will normally show the surname at the top and the country of origin at the bottom. Many people are of the mistaken belief that a particular family coat of arms is theirs just because their surname is the same or they come from the same country. For example the surname “SMITH” has over 100 different coat of arms for that surname. There can be multiple coats of arms for a particular surname from the same country or from different countries. The makeup of a coat of arms depends on many other factors as well. It depends on which country and what year the coat of arms was made, along with who had it made, and how boastful they were. Always keep in mind that surnames are normally derived from what a person did for a living, but can be derived from the place that the family was from or a description of a person. We use the oldest coat of arms that is in our records. This does not mean it is the only coat of arms out there. The only way to be certain of your family heritage is to have your family line researched by a professional genealogist, and this service can be read about at the following link: http://www.thetreemaker.com/family-genealogy-research.html
SOME COAT OF ARMS IS ACTUALLY OWNDED BY THE FAMILY WITH THAT SURNAME AND YOU MUST HAVE PERMISSION TO USE IT. If you have a particular coat or arms that you would like to match, or to create your own, then email us your ideas to us and we’ll make it for you. The fonts used for the country and surname on our coat of arms are normally in “Old English”. You can see some samples of what that font looks like by clicking here.
4.How do I know this is the right surname origin for my family?
We use a database that has the listing of most surname histories. Many people are of the mistaken belief that a particular family history is theirs, just because their surname is the same or they come from the same country. There can be multiple surname histories of a particular surname from the same country or from different countries. For example your family line may come from Germany and before that England, and before that Ireland. Also, surnames are normally derived from what a person did for a living, but can be derived from the place that the family was from or a description of a person. A good example of this is the surname “SMITH”, which has many different surname histories depending on a person’s occupation like: “Tin Smith”, “Silver Smith”, or “Black Smith”. Each of these origins can also have many countries that claim to be the origin for that surname. The histories of those surnames may or may not be in line with your family heritage. The only way to be certain of your family genealogy is to have your family line researched by a professional genealogist and this service can be read about at the following link: http://www.thetreemaker.com/family-genealogy-research.html
The fonts used for the surname histories and on our coat of arms are normally in “Old English”. You can see some samples of what that font looks like by clicking here.