I havent recieved overtime pay from my job for the past two years. I have tried to obtain this money to no avail. What are my rights to get this money

You can file a lawsuit to obtain the money.   However, unless it is a very large amount, you will probably not be able to get an attorney to handle the case on a contingency basis.  For that reason, you might want to consider filing a complaint with the Department of Labor's Wage and Hour Division.  Keep in mind that you can only recover overtime pay for a period of two years prior to the filing of a lawsuit.  That means that every day you wait, you lose some of the overtime.  It is unlawful to terminate an employee because he has filed a complaint with the Department of Labor regarding an overtime issue.  Even so, you employer probably won't be happy that you filed a complaint against them.  I recommend that you consult with an experienced employment attorney to discuss your options.