Am I pregnant 🤨

Ok so the 26th of December my boyfriend and I had unprotected sex I am taking birth control but I was not taking it the same time every day but I was still taking it anyways we had sex around the First of Jan sooo the 3rd came around and I didn’t have my period so the next day I took a first response preg test 👀and it said not preg but now it’s 5 days after my pissed period and I’m worried