Help....

I had sex with my boyfriend jan. 16th. We didn't have a condom so he pulled out. What I didn't know was that I was ovulating...... I can't get pregnant right now..... there was more discharge the next few days but then it was back to normal. I've felt weird and have been worried I could've gotten pregnant...... I'm not supposed to start my period till the 5th but there was a little blood when I went to the bathroom. It's never been early.... please tell me I'm crazy but please be honest.....