Hi, I had exact same treatment as you have and started taking Anastrozole. It made me so unwell I did stop taking it.  It may be that in the research it gives a bit more percentage in survival but there was no way I was going to cope taking it. I am 59 and finished my chemotherapy seven months ago and after being very sick I’m still having trouble with my stomach. That for me is enough to cope with. Everyone is different as they always say and you could live the rest of your life with no sign of cancer ever again wether you take it or not. There are two alternatives I think. When I stopped taking the tablets they didn’t offer me any other help they just discharged me. Maybe you could enquire about those. Sending you good wishes. 

Im on letrazole and had unbearable joint pain. I went back to the breast cancer nurse. I took a 6 week break from letrazole and they then prescribed me the branded version femara. This made a huge difference. Dont give up until you have tried alternatives as it can help

Fingers crossed for you that you get relief too