Sorry to see you've joined our exclusive club, @Kim2021 ..... that no-one ever thought they'd join. Welcome to the blog! Chuck up any questions & we'll do our best to answer them honestly.
As @iserbrown mentions - many of us are fatigued, which is bad enough, but the AIs can also trigger lots of aches & pains, which, over time, can trigger depression & anxiety. Exemestane & Letrozole did that to me. I am now on Anastrazole and am coping much better. Your condition may suit Exemestane better than the other AIs - ask your Onc about the other ones, just in case you may be able to change & try another one.
You can also ring the helpline (phone number in the blue banner at the top of the page) and chat with a BCNA staff member, who may also be able to help with your question. xx
Take care xx