Could I be prego?

The guy I was sleeping with ended up coming inside of me when I checked my log it was on my ovulation day which scares me now that I look bak at it I feel so dumb. I haven't been on BC in 2 years almost and I was suppose to start today but haven't! However, I have been having a discharge I know I Should wait a little while till freaking out. But, it's so hard to not worry.