Endometriosis Support Group
Endometriosis is a common medical condition where the tissue lining the uterus is found outside of the uterus, typically affecting other organs in the pelvis. The condition can lead to serious health problems, primarily pain and infertility. A major symptom of endometriosis is pain, mostly in the lower abdomen, lower back, and pelvic area.
As for your question I've never had my period go away when I had an endometrioma, but I've had it be irregular, lots of mid-cycle bleeding, clotty, more rusty "old blood" than usual, etc. I wasn't usually on BC pills though, so hopefully someone who has been can give their insight too.
Take care & hope you get your answers.
I also just started seeing an endo specialist earlier this year and he told me how the endometriomas could eat away at your ovaries and eggs if you just leave them there, that's why they need to be removed. My first surgery with a diff dr, they were just drained, so when I have my next surgery he is going to excise them off so they hopefully won't come back!