Hi all, bit of an update on the letrozole and pain issue.
I’m still waiting phone call from endocrine nurse so decided to bypass completely and took myself to the GPs.
Saw a new GP who listened as I explained all the pain issues and the MRI scans showing deterioration and inflammation of muscles.
After painful examination of muscles (mostly squeezing) and test for lifting my arms above my head she has diagnosed Polymyalgia Rheumatica.
She said that AIs can trigger autoimmune issues and that this is probably cause of mine.
Will mention to endocrine nurse if I can ever get hold of her.