B-Control was out of stock at pharmacy

So I went to the pharmacy to get my b control yesterday and they didn’t have it in stock. Thankfully they get it in stock tomorrow, but I am confused on how I should handle to situation regrading missing the first day of the month. Should I take only Monday’s pill or should I take both today and Monday’s pill tomorrow? I don’t think I’ll being having sex anytime in the next week so I think I’d be fine, but how will this affect my b control effectiveness (keep in mind I take my birth control perfectly, every day at the same exact time)?