Positive OPK at 5:30 pm but..... ?!?!?!?

Ovulation on an opk is usually anywhere from 12 to 36 hrs after a positive test. So there is no way of knowing if you missed it. Unless you had the fore mind to take another opk stick before you had . But there's a possibility to hit it right on the nose from saturday's BD. Cause sperm can live in the female body anywhere from 3 to 5 days.