Pregnancy/Period question

So I am due for my period any day now. I had sex 2 days ago and he thinks some might have gotten in. Usually pulls out. But my question is, is it possible for me to not get my period that fast. Like if I did get pregnant this quickly, can it just stop my period that was about to just come like today. I mean I haven’t gotten it yet but I was due this week. I took two hpt and both negative. Sorry if this is confusing and I’m not explaining it correctly