Hi, I started on Tamoxifen 3 months after my first diagnosis in 2006 (had surgery and radiation first) I was 50.5 and had not gone through menopause. I have a great gynecologist who advised me that with any bleeding I was to contact him and I did. Each time he would do an internal or a D&C just to be sure. (I had numerous D&C's but now after a new diagnosis in December 2011 I was changed over to Arimidex. I hate it. I have just started it again after my chemo has finished.) Each time everything was good but I am glad that I had it checked out for peace of mind. Please have it checked out - best to be sure. XLeonie