So, around three weeks ago, my boyfriend and I were fooling around and some of his cum got in my butt crack and I was scared that I could possibly get pregnant if it trickled down. so the next day we bought plan B and I took it within 24 hours. I started my period early the next week. It's been two weeks since my period and I am supposed to ovulate in a couple of days. Is there any chances or signs that I could be pregnant?? HELP