I am so stupid

I'm getting kind of scared.. I had sex a couple weeks ago, thinking I took my birth control pill... realizing that I forgot two days in a row... I took it right after I realized it... well that also happen to be around the time where I should've been fertile... now I'm suppose to be having my period and I'm four days late. Do I still have a chance of being pregnant even though I took the pills after having sex?