So last week on Saturday me and my boyfriend went to the sauna. We ended up grinding naked, he probably had pre-cum but im not sure because we had showergel all over us (yess also his&mine private parts). My legs were closed and he was behind me, here was no intercourse nor did he cum around my v*. Does soap kill the sperm? Can I be pregnant? I have also irregular periods but normally i should have been on sunday?