I've just had 6 months of Exemestane & had 'general aches & pains' - I found walking up stairs difficult and the aches in my hand joints (particularly the thumbs) continues to be painful & difficult - and I wobble a bit when I get up (but I also had some arthritis prior to getting BC.) Getting up in the evening from the lounge chair can be tricky - very slow & using the arms to help me get up
I didn't notice specific hip or lower back pain tho. I hope you are able to take something to lessen the pain & discomfort. I take a couple of Arthrexin (Indocid) at night, with my meal. It just takes the 'edge' off the pain
I am currently on a 4 week break from Exemestane (1 week in) - to see if the hand aches in particular lessen, to indicate it IS the meds causing the pain, vs the original arthritis!
All the best xx