Sajha is a terrible place to get a legal advice. Consult an attorney, they charge upto a couple of hundred bucks...some are cheaper or even free. Otherwise post it on a legal forum where you pay an attorney for answer.
As far as I know, most states (except NE and MS) require 18 yrs. but if you have parental or judicial consent you possibly can get married.
Again, ask an attorney, this is an important decision and you should've known better than blindly marrying an underage...sorry for judging.