When you’re on birth control you don’t have any fertile or ovulation days, if you take the pills every day correctly without fail, right?

I’ve been on birth control for 3 packs already and everytime I have sex I use a condom either way, and I haven’t missed a single pill. There can’t be any way that it can go wrong right? I can’t see my fertile days anymore so I suppose I dont have them anymore and can have sex whenever I want as long as I don’t miss a pill??