hey. had sex back in Oct. been feeling nauseated since.. not making pee runs though.. but definitely sickly from time to time... like i'll be eating and then suddenly feel full after just three bites. and my last period was really weird >.> like seriously. it went light, heavy one day, then the rest were either light or barely there. and i don't have money for a preggo test.. the condom during sex the last time btw, did indeed fall off. but i don't think he got anything inside me..but still.. um help?