Hello. I got some brownish reddish discharge (period?) 11 days before my next period, (12 days after my last period). I also have some lower back pain, as I normally do when on my period. My diet has also changed (by choice) - meaning that I am trying to eat healthier. I had sex 2 days after my last period, but the condom broke and I got plan b right after. My last two periods have been lighter than usual. What are the chances that I'm pregnant?? Or is my cycle just changing? I have no other symptoms of pregnancy other than the discharge/early period. This has only happened once before and i was not pregnant that time.