I'm 24 year old, and it has been around a week that I have pain in my left armpit, the lower part of it just next to my breast, I have been on birth control pills for more than two years now, but lately I had a continous pack for 3 months. so basically im expecting my period anytime now.
The pain is not always there, it comes and goes, but its sharp, My breasts hurt a little too, but I dont think its related to the pain in my armpit.
Any idea what it could be?