I am a 22 year old female. Relatively active and healthy. I feel like I pulled a muscle in my chest (weird i know). its right under my left breast right in the middle on the sternum. normally it doesnt hurt unless i do a certain movement like recently i bent over to kiss my bf whose head was in my lap and the pain was sharp and so painful i had to put pressure on the spot until it went away which lasted about 10 seconds.
At rest it doesnt hurt but i feel it there and when i stretch (like putting my hands behind my back) it hurts like a pulled muscle. I dont know how else to describe the pain. Does anyone know what this could possibly be or how to fix it? Any suggestion is appreciated. Thanks!