OK. Had unproteced sex last Sunday. Since then I've been feeling what I can only describe as weird. Have stomach pain like period pains, bouts of feeling sick (but not necessarily 1st thing in the morning), a bit dizzy at times, a kind of warm sensation in my chest and I have a taste like cigarette smoke in my mouth although haven't smoked for over a year. Is it just too early to be having these symptoms if caused by pregnancy isn't it?