i am an 18yr old girl just started at university. I started mi periods over 5years ago and understand yes they can take a few years to settle down. i started to enter a routine of roughly 35days from start to start. however the last couple years has been leaning more towards 50days. recently however i switched to 30days for 4 cycles, however i havent had a period for 12weeks ( 84days), i am not pregnant, i have taken many tests, and am now really concerned. what should i do?
thanks x