Drs are saying that I don’t have endo but I think I do?

My symptoms have been getting worse over time I’m experiencing chronic pelvic pain all day every day (feels like knives scraping deep inside and sharp pokes) that gets even worse during ovulation and the week up to my period and during my period as well. I also have pain that goes into my legs. I have a 2cm cyst that’s been in my ovary for almost 2 years the same amount of time my symptoms have been worsening and I think it’s an endometrioma since it hasn’t gone away. I’ve been to so many obgyn that tell me they don’t think it’s endometriosis yet I’m just continuing to suffer. What should I do? I’m really tired of suffering constantly. I really think I need a laparoscopy but none of the drs are willing to. I used to never have this chronic pain before. I would only get cramps two days into my period and Motrin would take it away but now it’s constant and so severe.