I'm on birth control for 3 months now. I take my pills on time.

However, I still get pregnancy scares lol. I'm just too paranoid. Am I the only one?  I know I'm protected though! But is it still effective? I had sex Friday and then Sunday. He came in me both days even though I'm on the pill. I'm just wondering if that makes it more risky or am I fine and overthinking? 🙈