Endometriosis (?)

A friend mentioned I may have endometriosis, I’m unsure I have 2 kids who are 7&5. I am 25. I have unbelievably bad back pain during periods and for a few days before and after. They are very irregular and very heavy. I can’t get a face to face with my GP and they aren’t very helpful over the phone keep prescribing pain relief which doesn’t help. But surely super heavy periods irregular and painful isn’t a ‘normal’ thing. Uncomfortable sure but bed bounding really?