Missed menstrual period, vaginal discharge, pelvic & abdom pain. low back pain. neg blood pregnancy test. history of endometrios and infertility. ?

Normal: With a history of endometriosis, unfortunately, this scenario can be normal. A lot of women wtih endo suffer from irregular periods and pain as you describe it. Often a gynecologist will prescribe birth control as a first line therapy for women with endo. It can help regulate periods as well as diminish pain. Other options for pain are NSAID such as Ibuprofen during pre-menstrual and menstrual.