Is it okay if I still take my birth control?

Macey

I had sex on Saturday and also finished my period on Sunday. But Sunday was also the day I was supposed to get a new pack of birth control pills but the pharmacy messed it up and I work a lot so when I get off work the pharmacy is closed. Tomorrow will be 4 days that I haven’t taken my pills. What should I do when I get them? Can I still take them? Do I have to wait? Is there a chance I could be pregnant?