A little worried

So I was doing it with my boyfriend yesterday (with protection) and I was on top and I got off as I felt him stop because my legs were sore lol and as usual he was gripping it waiting for it to shoot out and he told me he saw and felt it shoot out but didn't see it filling up and there was a hole! He told me was positive he didn't finish inside of me and he finished when I was off, and I always make sure he pees before to lessen the chance of any Precum containing any spermn whatsoever, but I'm a little worried maybe something got out early or something?? I'm 2 days away from my period.. what do you think??