About a month ago i stopped taking tamoxifen after 5 years. I am 51 and having a 6/8 week break in order to check my hormones (to see if I’ve been through the menopause) before starting letrozole for 5 years. I had no side effects whilst taking tamoxifen but since stopping I have had constant debilitating migraines (something I suffered with pre bc). I am gutted to be back in this constant cycle of migraine/nausea and tiredness - I could literally sleep all day & night. Has anyone else suffered migraines since stopping tamoxifen? Tia