A side effect Chart for most of the Hormone/AI tablets ... on one page

Forgive me if this has been mentioned before... I've noticed something rather strange and while I'm sure it's purely coincidence, I'm intrigued.  The Letrozole has caused pain in many of my joints and I think, soft tissue, but the level is not symmetrical.  My mastectomy was on the right side - the level of pain on my left side is significantly more than it is on my right.  Just a coincidence? or a brain thing? am I favouring my right side?  am I just left-side compromised naturally?