Something's alil off

So I don't really know when this all begin but maybe around 7 months ago I started getting these really sharp pains in my butt whenever I got my period but I didn't think much of it at first then in June my period last almost a month so I when to my gyno and she took blood test and felt around and said it should be fine but if it happens again come back. So it never happened again but I've still been having those butt pains whenever I get my period. Then in October sex started to hurt a lil and after sex I would bleed for like 3 days. Sex still hurts but it's not unbearable and I've been off my period for a week however I'm still getting those butt pains. As I've been looking online the symptoms seem to be endometriosis which scares me I know nobody here is a doctor but I was just wondering if anyone else has experienced this or has any input since my next yearly checkup will be in January I'll just wait till then to bring it up to my gyno