This is dumb but I need help

I didn’t want to be one of those people who ask a dumb question when the answer is obvious but I just need some clarification.

So I had intercourse with my boyfriend, he pulled out and came and then he told me that he thinks a little bit got in me. He isn’t sure but he gets this feeling as soon as he is coming and he got it when he was just about to pull out.

Now this is the stupid part. I am 6 days away from my due time. Is it possible that considering where I am in my cycle and the smallest amount of semen, could I get pregnant?