Hi. Thanks for your query. Noted the history and understood the concerns. Since you were operated for Endometriosis and Adenomyosis by Laparoscopic hysterectomy, the ovary are still active and have not been removed hence the cause can be: Endometriosis of the pelvic cavity still active and most probably hormone dependant thus causing the pain during ovulation. Another possibility is about having pelvic inflammation that has not yet settled and thus causing reactionary diarrhea and vomiting. Another reason can be Gastroenteritis that developed due to faulty food habits or an intestinal infection or food poisoning. I would advise you the following in such a situation: CT scan of the whole abdomen including pelvis can be of help to get an appropriate diagnosis an a plan of management.