I suffer from endometriosis. i'm currently experiencing a flare up when i try to poop my hips burn, but now i have this left back pain and when i uri?

Endometriosis: There is a high chance your symptoms are related to endometriosis. However there could be other associated pathologies going on as well such as a pelvic infection or ovarian cyst or abscess. See you doctor for a full evaluation and treatment

Unusual: This combination of symptoms is very unusual for endometriosis. You need to see a doctor for this soon.

Urgent Care: You need an immediate in person full history and physical exam and urinalysis You need a pregnancy test and workup for possible urinary tract infection ascending to your kidney which can cause radiating flank pain. Stay calm and see an MD.

Get checked out: It sounds like you need to make sure you don't have a urinary infection on top of your endometriosis flare up. Go get a urinalysis.