My period has alway need irregular but over the past year or so my period has been super irregular. For example it will come every month for a few months then disappear for a few more months completely. As of right now I haven't had my period in 3 months. I've never had sex so obviously I'm not pregnant. Does anyone know of the cause of this? Or has anyone else had this happen to them? Should I maybe go to the doctors? If it helps I'm 19 years old and have had my period since I was 13. Thanks for the help!