Hi. Well, it certainly could be. Sorry you are having the discomfort. Being a woman is hard! I do think that birth control solves a lot of monthly issues like the cramping, moodiness, etc. So, that may be something you want to revisit. Here's some information about it https://www.mayoclinic.org/diseases-conditions/endometriosis/symptoms-causes/syc-20354656 Since your doctor didn't diagnose you but said it was a possibility and you are still having issues and it is worse, it would make sense to find out if you really have it. I would. I don't think you'd actually need surgery to have it diagnosed. They do ultrasounds now and MRI's that can give a good idea. So, talk about the ways they diagnose with your doctor. I can see wanting to avoid surgery. How old are you by the way?
It sounds like it could also be pelvic congestion syndrome which is vascular. See an interventional radiologist as they specialize in diagnosing and treating pelvic congestion syndrome. Don’t rely on a gynecologist to help with that. Definitely have the laparoscopic procedure done as it’s very possible you could have endo and I had it myself and didn’t know for 17 years.
Also find a urogynecologist and start pelvic floor therapy as you have pelvic floor dysfunction and pain and it will greatly help improve pain and symptoms.