I missed my period, what are these weird symptoms?

I just met this guy we have been dating for almost three months. We had sex it was a in the spur of the moment thing i have now missed my period which is okay for me because my period is no very regular. but now my nipples itch and hurt i also keep wanting fried foods but i'm still thinking its because my period may be coming i crave a lot when my period is on its way. So he asked me the other night if i think i may be pregnant and it got me to thinking so is this just normal period or what should i expect