Late!!

Me and my boyfriend fooled around a he just put the tip in for a little bit and I didn't think anything of it..... But a few weeks later we had sex for the first time and the condom broke and he pulled out right away and he did not cum inside of me I took plan b just to be safe of pre cum but what about the time before when he put the tip in and the pre cum I am very late on my period and we are both scared and don't know what to do