I have a pain in between my breasts. the pain is more on the right side and goes under my breast. touching reduces pain & sharp pain w/ deep breaths

Costochondritis: Pain in the center of the chest associated with deep breathing and no other symptoms is commonly costochondritis, an inflammation of the joint between the rib and the sternum. You should see your doctor to confirm this however, as chest pain can also be due to serious heart and lung issues.

Possibly: costochondritis but you should see your doctor to confirm the diagnosis and rule out any other causes.