Hi, I'm 18 years old and for the last 3 months i have been having periods every two weeks. This has left me exhausted and mixed with other life changes, feeling depressed. I barely leave my flat and sleep around 15 hours a day. I have no motivation for anything. I have had my bloods checked, and they're fine. I dont know what is causing this, and it is worrying me. My doctor does not seem particularly worried by the problem at all. Does anyone have any idea if it could be endometriosis, or something else?