It's not about age Spath, I am younger than you, or even being offended, it's about using language appropriate to ask a sensible question on a serious topic. The OP realised this and altered it to something more suitable ( 'cum' is the correct spelling in this instance as well btw whoever mentioned that). I think it's a little tiresome that you persistently come on waving the 'youth' card, as though everyone else is some nutter who isn't 'down with the kids'. You don't speak for me or anyone I know so please stop telling everyone off with a different opinion to you.
To answer the question, you are unlikely to be pregnant, but take a test anyway as Ummmm suggested so you have a decent amount of time for consideration if things are not as you hoped. If you are on the pill and using a barrier method as well and still worried then sex is going to be very stressful for you.