personal affairs

okay guys, i have just started birth control. im on day 10 of a combination pill. i know its in my system bc im experiencing side effects. the website & manufacturers of the pill said it protects me from pregnancy after only 7 days. today i had unprotected sex w my boyfriend. im not worried, but he is. he also pulled out before cumming, but is still worried im pregnant. he is like this after every time we have sex, even when using a condom AND pulling out. im NOT his first, & he is 20 years old almost 21. his constant worrying & freaking out every time after sex is VERY annoying. annoying to the point i now dread having sex w him. PLEASE give me advice on what to do or how to help him relax. or is stopping intercourse w him my only solution?