Hello ladies! I just completed 13 months of tamoxifen. I was premenopausal when I started on it, but within 8 months (at age 47) I had completely lost my period; I also had all the symptoms of menopause - the hot flushes, dryness, fatigue, night sweats. However, 3 months after my period had stopped I had an issue with a huge ovarian cyst that caused extreme pain for a while. This issue resolved on its own, but now (after 5 months with no menstrual period) I had a massive bleeding episode...lots and lots of blood, no pain and no clots, but lots of brown and dark red blood. Went to my OBGYN and they decided to biopsy my endometrium. I just can't believe everything that keeps popping up....has anyone gone through something similar while on Tamoxifen? What was the outcome? Thank you for any light you can share with me.