For a couple of days now I have had pain behind my right breast and when I sleep on my side it hurts or actually uncomfortable. I remember bumping into a door on Saturday and bumped my whole front so I thought maybe that may have bruised something inside. There is no history of breast cancer in my family, I dont smoke and I eat pretty healthy. It bothers though and I would like to know cause I read someplace that a symtom of breast cancer is pain, I dont have any lumps but my right breast is a little more swollen than before, maybe from bumping into the door which was pretty hard. Thank you