I put in the app that I have back pain, and an insight came up that it can often be a sign of endometriosis... I looked it up and I have a lot of the symptoms, like diarrhea, abdominal pain, nausea, back pain.. I even took 3 days off of school because of the abdominal pain and nausea that I was having.. that was before my period started. The back pain started during my period. I am really worried, but scared to go see a doctor because I know they are going to have to do a pelvic exam.. advice?