Unprotected sex and the pill

I've been on the pill for about 3 years now, and my boyfriend and I have had unprotected sex before, but we have had more unprotected sex in the last week than we have our entire relationship. (Neither of us have been with any people before so we are both clean). I haven't missed a day of BC, I always take it every night within a 20 minute time frame, but I'm still worried. Do I have a right to be worried or am I overreacting?