31, female. I woke up this morning with pain higher up on the left side of my chest and in my left armpit. My armpit only really hurts when I extend my arm out straight ahead of me or to the side and it’s only slightly painful. The area on my chest hurts when pressed on or when I move or lift my arm. Id’ say the spot is about an inch or less down from my clavicle and also another spot close to my armpit has a similar feeling. It doesn’t hurt when breathing, eating or drinking. Only with movement of my arm or when pressure is applied. Wondering what could be causing this?