Help! My nipples are killing me! I'm supposed to get my period soon/today but i've never experienced this before. Normally my breast will become sensitive/sore too but they aren't, it's just my nipples that are so sensitive. It's been a week and is just getting worse. Is it my period that's causing this? Am I pregnant? Is it the Covid vaccine messing with me? (saw they're doing a study, researching how the vaccine affects menstruation)