Could I get pregnant ?

Riz

Me and my bf had sex on my first day of ovulation I checked the app after and it said (High Pregancy chance) we used no protection for about 2 minutes just to get started and then used protection. I feel that I am okay and it didn’t seem to be any precum there but should I still be worried just Incase ? I don’t want to use a plan b because I have used one before. Am I overreacting or should I take it ?