Is she pregnant, please help me out?

so me and my girlfriend were messing around.she didnt have pants or underwear on but i was fully clothed.so my shorts were touching her vagina.i was thrusting and as soon as i felt like i started to *** i got off.my shorts might have been alittle wet but if so not enough for me to really remember it.but im kinda freakin out abit. what do you think?