Is there a way to test fertility if I have endometriosis?

YES! With endometriosis, we worry about pelvic adhesions (scarring) and surrounding inflammation. An ultrasound and a hysterosalpingogram can be helpful to see if the tubes are blocked or open and make sure there aren't any ovarian cysts. If there is something abnormal, a laparoscopy can fix these problems!
Yes - get tested. Some women (not all) with endo. Have major fertility problems, even in their 20's. It is important to check your egg supply (ovarian reserve) including an ultrasound which will detect endometriosis cysts and check your follicle counts, and amh and FSH blood tests. Hysterosalpingogram (hsg) looks for blocked tubes or scarring around the tubes. Your partner needs a sperm test. See a fertility md.