My boyfriend and I have been having unprotected sex quite frequently, using the pullout method. I have about ten days until my period is about to start and for the past three I've been feeling very nauseated and tired and I've been shoveling in food like CRAZY but then after I eat it all wants to come back up. I've also been very consipated which has me bloated like crazy. My boyfriend thinks there's really no need to worry until I actually miss my period because he believes he's infertile due to something that happened to him as a child (i don't know specifics) and the drug abuse he'd been battling. My family on the other hand is naturally under body temp making us EXTREMEMLY fertile. I'm terrified im pregnant. Are my worries valid?