I'm 22 years old and my family doesn't have a history of having breast cancer. About two weeks ago, I've noticed that my right breast, which is noticeably smaller than my left breast, hurts whenever I squeeze my right breast while wearing a bra. This sounds very strange but that's what happens. The pain is located right under my armpit, on the side of my right breast, just as my breast is starting to round.
Sometimes it still hurts if I squeeze my right breast after I have taken off my bra. But if left alone (whether I'm wearing a bra or not), it doesn't hurt, only when I squeeze. I have also noticed that whenever I squeeze my right breast, it's a bit hard where the breast joins the chest, but that's also what it feels like on my left breast (the one that doesn't hurt).
Could this be a sign of breast cancer? Or is this normal? Any help would be greatly appreciated!