so I'm a very well developed in my boobs. I'm a 34 G and the last 2 days I have had r boob pain/soreness. it's mostly on my left but somtimes both. and it's on the outside of my boobs close to my armpit. it even hurts to breath or move my arm at times. not saying it's pregnancy but just worried cause I know breast cancer starts near the armpit. I dont have lumps I have checked. also there was no incidences where I believe I could have pulled a mucsucle or hurt it has far as I know... anyone have this before???