Period problems

Hey ladies, I’ve had VARY painful periods for about a year now. I’ve been to two different doctors that did lab and ultrasound, everything came back normal.

I get sharp pains on the right side that starts the week before and continues the week of my period. It also happens when I have intercourse and will come and go the day after intercourse. The only other abnormal thing I can think of, is I’ve also had strips of uterine lining in my period. Don’t know if that’s related🤷🏼‍♀️ sorry TMI