So I'm on BC and we use condoms too and I haven't missed a pill, and I never get symptoms before my period. But this week my boobs are killing me, my back hurts, been nauseous a couple times, exhausted, and have had a few weird pains in my crotch that I've only had when I first was pregnant with my son (round ligament)....but I can't be pregnant right? took a Wal-Mart cheapie and it looked negative the other day. AF supposed to come Wednesday. if I was, I'd miss my "period" right??