HELP SOS

my boyfriend almost put the tip in but didn’t and i’m sooo nervous i’m gonna be pregnant, i got my period last month and it’s predicted to come on the 17th the app says it’s a 3% chance of getting pregnant. i know he didn’t cum because immediately after i came back from going to the bathroom he was hard again. i really need some reassurance because i’m so nervous. i just don’t see how i could get pregnant since there’s such a slight chance and he didn’t cum at. all.