Im having very bad uterine pain that keeps me awake at night only during ovulation week (about 5 days). what tests should be done?

Ovulation pain ?: Pain with ovulation or similar pain just prior to the onset of menstruation can be associated with endometriosis, with the drop in estrogen at those two time periods causing withdrawal pain from endometrial implants. Another cause can be the rupture of the follicle cyst when the egg is released. Ask your gyn about low dose oral bcp's, which can alleviate this discomfort.