Tamoxifen and Thickened Uterine Lining

I would like to thank everyone for sharing your stories. I am dealing with the same issue and trying to decide what I should do about Tamoxifen. It helps reading your stories. It would help more though if everyone can mention their ages (or a age range) and menopausal status. I think we get a new lining every month as we go through our cycles. My gyn told me that 7-8 mm was normal for ovulating women, and they can have simple cysts that would resolve on their own when we have our periods. I just turned 50. I thought I went into menopause after my chemo but my periods came back. They are irregular. My previous gyn mistook my periods for irregular bleeding and did a biopsy. She scared the life out of me and put me on the fence about Tamoxifen. Now I have a new gyn and he doesn't seem as eager to perform a D & C on me. We are keeping an eye on things.