I have not seen my period for over six months now

well there are so many problems that can cause what u r experiencing. some being really nothing others being more serious. my best advice for u would be to go to the doctors to get a work up. it is something that is really required. if u do not have health insurance u could either go to ur local health department or planned Parenthood. planned parenthood being the best one because they ofer more advanced. screening and testing for people who don't have insurance.