I'm 59 years old. Had breast cancer stage two; had lumpectomy; four rounds of chemo; and radiation 2008-2009. Doctor had to change my estrogen inhibitor med from Arimidex, after two years, due to too much joint pain. I just started taking Tamoxifen for the last three weeks, I'm noticing a white discharge; is this a side effect? I mentioned it to the doctor, but he didn't address it.