combined birth control pill: day 2 and no bleeding! anxiety! can anyone give me some reassurance?

ive been on the combo pill for ab 3 years now - im not in the place or position in my relationship to be getting pregnant at all. the idea of it really really scares me... so bad I don't wanna have to test bc I don't know what id do if I was. but, people want to have sex and that's why im on the pill. recently, though, I've had terrible anxiety each month over if im pregnant or not. I had a scare a few months ago from a short, light period but my next period (last cycle) was normal and actually kind of heavy, starting on day 2 with very light spotting. this cycle, I haven't missed a dose at all but I have been taking it "around the same time" and not exact. I have taken it within the 515-715 (at the very latest) window. I normally take it at 515. anyways, its day 2 now of my placebo week and there's no sign of bleeding at all - no cramps really or anything. last week, I noticed some very small and short lived brownish mucus. I also left the house and took my last active pill 4-5 hours late which freaked me out. I again have myself on this anxiety train though. my bf and I do have unprotected sex, so no condoms or anything. I don't want any lectures or be told to test bc I know that - just thought someone could give me some reassurance. do you think im okay or should i be worried that I haven't started bleeding yet? im thinking ab an IUD or doubling up on protection to avoid this in the future.