Chest Pain With Shoulder Presses

The past week I have been experiencing chest pain in the middle of my pecs just above the sternum. It hurts during military presses and DB shoulder presses. It does not hurt during chest movements.

It also seems to hurt when i turn my head to the right or left and extend an arm in that direction. Ive tried researching this and it seems like it is either a connective tissue problem or some type of back tightness.

Any ideas? thanks