Sex for the first time and confused about BC and pregnancy

I had sex for the first time on Feb. 1 and again on the 2 and 3. I had sex last on Feb. 7/8 (it was like 3 am). I am on the pill and take it every day just not at the same time. We used condoms. Tonight is my last night on the effective pill before I start the placebo. I have this idea in my head that condoms aren’t 100% effective and that sperm lives in the body for up to five days. Since I’m going off the pill tomorrow night is there a chance I could get/be pregnant if the condom didn’t work effectively?