Sudden Onset Of Nausea, Sweating, Dizziness, Headache, Anemic And Having Heavy Periods. Cause? Found Thick Uterine Lining, Scheduled For D&c

For over 6 months now, I get episodes about 1-2 times a month of sudden onset nausea , profuse sweating, dizziness , and headache. I ve also had heartburn for the last 5 days. I also have been recently diagnosed with slight anemia and have very heavy periods that last 7-8 days. My doctors are currently running tests on me and they just found a thick uterine lining of 11mm a week after my period ended. I m scheduled for a d&c this week to check for abnormal cells. It sounds like they have found a couple of different issues here with me, but I m most concerned about the nausea and dizziness episodes I mentioned earlier. It s very difficult to deal with as I m out of commission when it happens - meaning I can t work or take care of my children. Any ideas what this might be caused from? My primary care physician is sending me for an ultrasound of the abdomen next week.