I screwed up..

So I've been with my boyfriend (Dillon) for 7 months now and I'm his first but he isn't my first (this isn't the problem) the problem is a couple of days ago we were having sex and he felt like he was cuming so he pulled out but nothing came out so he went back in and then a couple of minutes later he came again and this time stuff did come out...but now we are kinda afraid that because he went back in after the first time even tho nothing came out..there might be a chance of me getting pregnant..idk what I need help with exactly I just want to know if anyone has had this problem...if they got pregnant..