The Pill

Sooo I have been on the pill for 4 months now. I am very good about taking it on time . I have never taken it more than 10 minutes late . But it seems like every month so far , I have messed up one pill . The first two months I dropped one pill down the drain . Last month on my very last pill I took it about 4-5 hours late because I was at the hospital for a car accident . I always hear about people still getting pregnant on the pill . My boyfriend never cums in me but we never use protection either and of course there’s pre-cum.. I don’t know I’m just always so paranoid and stress myself out. Should I be worried?