could I still be pregnant?

I had unprotected sex yesterday, and I started my period today. Could I still be pregnant tho? I'm on birth control but I forgot to take my pill on Saturday, so Sunday I look both Saturday's pill ( the blue pill) and Sunday's pill ( which was my first placebo pill of the week) I usually start my period on Wednesday but I started today, Monday. I figured i started early bc I missed that pill but I just need some assurance. What do y'all think?