Sex after period

My period was on october 10-12 and then I started drinking my pill on the 3rd day of my menstruation,, my bf and I had sex last oct15, which I'm on my 4th day of taking my pill. He didn't cum inside me,, instead he just masturbated, he never reached his climax while doing sex with me, he always masturbates. And then he went to the bathroom to wash his penis and pee, and then after an hour we had sex again and same scenario, he didn't cum inside me instead he masturbated. Should I be worried? :( it say's in this app that october 15 was least chance to conceive.. please someone answer me. Thank you so much