When will the hurting stop...?

When i was 16 i started having this sharp pain in my lower abdomen. I had very irregular periods and that was the year i lost my virginity. My "family" doctor assumed (did NOT run ANY tests) that i had ovarian cysts and put me on the birth control pill. I then started throwing them up, it didnt matter if i took them in the morning, night, with, or without food so i took myself off of them. I am 20 now and the sharp pain is still there. It happens a lot during sex, but lately it hurts when i walk and use the restroom. I have had to stop in the middle of sex because I hurt so bad and ive even cried during sex because of it. I have seen multiple different doctors, ran numerous tests, and they all tell me im fine. Just 2 weeks ago i got on the IUD. I feel as if the pain has gotten worse..

Someone please help.. im so tired of hurting..