Positive ok I wanted to stop trying but I had second thoughts and decided to take an opk it was…

Positive ok

I wanted to stop trying but I had second thoughts and decided to take an opk it was blazing positive. I am cd 15 and I can't bd until tonight I bd 3 days ago. I will tonight and the next 3-4 days do I have a chance to catch my egg.? Or am I out.