Endometriosis?

I have really painful period pains have done since I started which was 12. I’m now 22, recently came off the pill and my pains are so much worse now. No medication doctors prescribe touch the sides for my period pains and also have about 1 week off no pain as I have them while I ovulate too. Also haven’t got pregnant so I’m wondering if this could also be a sign I have endometriosis. Doctors never take me serious so idk what to do. Does it sound like I could have endometriosis at all or something else if anyone else has been through this?