ahhh help!!

I’ve been using the birth control pill for about a year now. I skipped last months period but I didn’t freak out because I skipped it once before a while back and nothing was wrong. but now i was supposed to start this week according to my placebo pills but the app says next week according to past cycles. I take my birth control at the same time every day and I have never skipped. we don’t use condoms but he has never came in me. so could I be pregnant? should I be worried? I’m thinking about buying a pregnancy test this weekend just in case. what are your thoughts?