Ok, so this is a litle hard to explain but I'm gonna try my best. Ive been having discomfort, it's in the upper, left side kinda left of my left breast but it feels like it's on the side. Any ideas what it could be??!! I've been painting the past two days so I don't know if that couldbe related.. I am right handed but I do use my left hand too. Thanks for any advice anyone can give me!!