Could I be pregnant

So yesterday I had protected sex. I usually start my period around this time of the month, and I started yesterday on cycle day 29, which is pretty normal. I know that having sex near the start of a cycle can cause your period to come. I’ve read that it is very unlikely that having sex near a new cycle will result in pregnancy, but I’m still paranoid lol. I know it’s too early for conception but can I still be pregnant? I’m 17 for context, and am not in a relationship with the person I had sex with.