What should I do??

So me and my bf had sex and we were trying a new position and we had already been going for a good 15 minutes and then the condom snapped going in and we stopped immediately there was pre cum in the condom so I took afterea just to be safe Bc we are not looking to concieve, that was 3 weeks ago and now my period is 4 days late, is this due to the hormones in the pill or should I take a pregnancy test??