How will I know when I’m ovulating/on ovulation?

I’m an 18 year old who’s afraid of getting pregnant. Today, my partner and I had an unprotected sex and the only birth control that we did is the pull out method. I always overthink REALLY HARD after we finished having sex cause I can’t get pregnant. I’m on my cycle day 9 today. Will I be okay?

#UnprotectedSex