Hello, I have been experiencing sharp pains under my left armpit down to my breast. It started about 1 week ago, a few pains occurred under my right armpit down to my right breast, but today, it is strong on my left side. I think it is something to do with my menstrual cycle, or what's left of it (as I am getting older- 45 y.o.). But my roommate thinks it could be more serious. I don't want to go to the dr or hospital and find out it is just my period symptoms, that would be embarrassing and waste of time and money that I don't have. What do you think?