Hi. Thanks for your query. Read the history and understood the problems. To recapitulate : you were put under Ortho Tricyclin Lo for birth control - you has pain in the right abdomen - Gynecologist did Laparoscopy and found the endometrial like cells going towards appendix ( Endometriosis), so removed the appendix, the pain recurred with more severity on the same right side Birth control changed to Loestrin 24. From an elucidate history you have provided, this looks to be Endometriosis. Another possibility is Irritable Bowel Syndrome as Laparoscopy would have diagnosed a lot many more things , which are not present as not mentioned by you. Get treated for IBS if all the investigations are normal- including colonoscopy, CT scan of the abdomen .