I had my period 30 days ago and I'm not having any of my usual symptoms for when it comes?

Okay, so first things first, I'm a virgin and I have a boyfriend, we've done everything BUT sex but we've reached the point where his penis touched my vagina without going inside. Maybe precum could have gone inside me? Idk.. I'm not too sure if I could get pregnant from this or not, but it's been 30 days and I still haven't gotten my period. By now my breasts would have hurt horribly and I would be really moody. But right now I'm actually on summer vacation and i'm spending time in Poland (I'm originally from Florida) so I don't know if the travel and schedule difference is to blame. I'm really confused and really nervous.