@SallyS Hey there! I was on Tamoxifen for 4yrs after my 1st diagnosis but don't recall any side effects. I've not ever heard of Anxiety being a side effect of it, so that's interesting. After my 2nd diagnosis in 2015 I was put on an AI in January 2016, my Oncologist prescribed Effexor for the hot flushes, its actually an anti depressant but is widely used to treat menopausal symptoms arisen from AI's. I tried to take it about 3 different times but was so sick on it. I never took it and learned to put up with the hot flushes which they still happen but have lessened I guess over the years.
I'm wondering whether the Anxiety is due to the trauma of the whole BC path you've been on, I only say that having been on the road for 8yrs and how it manifests in so many different ways and at different times. Have you had some counselling? I really cannot recommend it enough. I've always been quite a tough nut through challenging circumstances in my life but I really have to say that a Psychologist at different points really helped find perspective, its just so incredibly helpful and not something that needs to be ongoing, but for as long as anyone needs.
Hugs x M