You don't need a lawyer; contact the wage and hour division of the labor board in your state. If it can be proved that you are owed overtime they will enforce it and make your employer to comply. Towards the end of your question you briefly mentioned being on salary. If you were hired on the basis of a fixed salary then that could hurt your case.
Rick is right.
A male or female that has property, home and or money in the bank can have the person that they are going to marry sign a prenuptial agreement. This a document that a person has been asked to sign before getting married to the one that has something so that in the event of the death/divorce of the one having the property, etc can not get anything that that person had prior to getting married. Anything that the couple buy "together" AFTER marriage is NOT included in the agreement. This not done in all marriages either. This is done to protect someones belongings, as there is, sad to say, folks out there that do prey upon those that do have something, "pretending" to love them so that they can have it once the other person is gone.
One other thing, a parent can even have this put into their Will for their children. Meaning....what ever the parents are leaving to their children once they have passed on. The parents can have a prenuptial agreement put into their Will so that the person their child marries can not get the estate in the event of the child's death/divorce.
Folks should get married because they love each other and not for what the other person has. So the prenuptial just protects the person that might have something. Now days more and more folks are getting a prenuptial. Bottom line on a prenuptial agreement is, who ever signs the agreement can NOT get anything that the other person already had after they sign it. Example..X has a million dollars, Y signs the prenuptial, Y gets no part of that million. Together X and Y make another million after it was signed, Y is entitled to at least half of that last million, if not more (in most cases). Hope this helps you out some.