I am 52 yrs old and menopausal. My last period was almost 2 years ago. Last year I was diagnosed with breast cancer (caught it at a very early stage). Had to go thru several sessions of radiation, Took taxoxifen for almost 8 mos and stopped it a few months ago - couldn't take the side effects (hot flashes, etc.) started seeing a Naturopathic Dr. instead. Few months ago (2-3 mos) I have been spotting intermittently. Ultrasound results showed thickening of the uterus lining. Aug 14th went for a biopsy to GY - I was told that I shd expect some spotting for a couple of days after the procedure. It is day 5 today and Im getting heavy period with lots of clots - not sure if that is normal. I wont be able to talk to a doctor till Tuesday and Im very concerned - what could it be??