question: I m a 16 year old girl my period is very irregular sometimes I don t have my periods for months I have shown to many gynaecologist and have done many test they prescribe me some medicines and I start having normal periods but once the medicines are stopped I don t have my period but recently a month I had my normal period without any medicines but again the next month I didn t have my period but again now recently I m having cramps but no period I m fed up do I have cancer or something?? and yea even I have thyroid but my thyroid test says everything is normal