Could I be pregnant?

Yesterday I had unprotected sex with my boyfriend, he pulled out and also This app said for this time of the month my risk of pregnancy was 3%. He is worried that I could be pregnant and I need advice, do you think I should go to a nearby sexual health clinic to get the morning after pill in the next couple of days or wait till 2 weeks (30/11) to just take a test I’m literally torn on what to do. I think my risk is small but I just want to be sure I am not pregnant, a little bit of pre cum got inside of me but google said that the chances are very small because he hadn’t masterbated or anything in 2 weeks. If I leave it until I’ve taken the test and it came back positive what would I do then???