Should I stop being worried

2 days ago Tuesday me and my boyfriend had unprotected sex but my risk of being pregnant was 8% high risk but my fertile window ended on Tuesday but we stop having sex and he was still on hard when we were done but couple of minutes later he nutted should I be worried still even though he didn't nut in me and yes I checked for pre cum before he didn't have any is it all in my head that I shouldn't be worried ??even though he didn't nut in me but I still took a plan B just in case Today (Thursday)