Could I be pregnant!!?

So last week Wednesday I spent the day with my boyfriend at his house and we were alone I’ve been with him for a while and we have fun but I’ve never had sex and that day I decided I wanted to so I had given him a bj before that and he didn’t cum yet and so we didn’t use a condom and we had sex now he didn’t cum in me it only lasted a couple seconds because he said it wasn’t a good idea to do it unprotected but he had a small bit of precum before he went in me it’s only been a week I don’t have any symptoms my period is supposed to come next week so I don’t know if Precum can get you pregnant or not and I’m not ready for a child I’m kinda freaking out