Help! Accidentally took placebo pill.

I just started week 3 of my bc pills pack. I went to take my pill today and noticed the first placebo pill is gone. It finally hit me that I accidentally took the first placebo pill instead of the first active pill of week 3! I had unprotected sex on 1/11 and 1/12 (mind you I took all the pills before this incident on time). I took all the other pills on time but now I’m worried since I messed up last night. I took the one I was supposed to take and the one for tonight at the same time. Should I be okay? I’m supposed to get my period in about a week. I’m just nervous. Help!