Boob pain

Marlee
I've been having really bad pain in my boobs I've taken like 12 pregnancy tests all were negative and my period is really irregular I've gone 5 months without it before and my last period was march 4th-11th and then I had some light brown spotting about 2 weeks ago but the pain in my boobs is so bad I can't touch my nipples it even hurts when they get hard and just standing with my arms down hurts even my shirt or bra rubbing my nipples hurts and I don't know what's going on. Does anyone have any ideas?