Occasional sharp pain upper right ribcage underneath arm.big breath hurts, like muscle.isually when i carry my heavy purse. breathing ok.what is it?

Rib cage pain: Your symptoms sound like costochondritis which is inflammation/irritation of the cartilage the lies between the ribs and near your breast bone (sternum). This is usually treated with over the counter anti-inflammatory medications. If your symptoms persist, I recommend seeing a rheumatologist. I am happy to do a consult if you desire.