Helllllllp I need advice

So I had protected sex 2 days ago and my period is due on Friday so I literally had sex 3 days before my period. I just really really want to know if I was to get pregnant would I still get my period tomorrow ? Or would it be interrupted? I mean I used protection but I forgot my period was coming so soon if I would've remember I wouldn't have done it, I'm just curious because I don't wanna be pregnant and I would really like to know if I was to be pregnant would that interrupt my period  or would I still get my period and miss it until next month?