I'm confused with ovulation and conception timing. My bf and I arent TTC, but I think I may be pregnant, which is fine. My last normal period was 10/10/2011-10/14/2011, and was routine. We had unprotected sex 10/15/2011, and my period for this month which was 11/4/2011-11/6/2011, was a few days early and only lasted 2 days. I took an HPT on 11/10/2011 but it was negative. Could I still possibly be pregnant? I cramped all day yesterday, i'm constantly nauseated, irritated, and my breasts feel tender. Thanks in advance for any advice you may have.