On the bright side she has shown you she is a ho and now next time ur out that fuking pussy won't fuk with you again!!! U gotta act, it is the principal of the thing. Even if u didn't give a shyt...
Upper chest can be stimulated through reverse military press (close grip) and incline bench press, but done in a special way, start to press the bar off ur chest like normal but use an arcing motion...
Dude go see a doctor (srs) there is a condition that causes this and requires treatment. I can't quite recall but a guy at my gym had it, some **** like a hip anomaly or some **** like that.