Should I be worried?

My boyfriend and I had unprotected sex on the 7th of this month for like five minutes. He didn't finish in me I'm two days away from my period. I'm on birth control I've been on it for two months and a half about to be three. Take it everyday maybe an hour at the latest. It's a combination pill. I took a test two days ago and it said negative I'm taking another one tomorrow morning. It's 2 weeks tomorrow. Should I be worried? Or am I freaking out for no reason? We both agreed on using condoms because this stress is not fun and we are not ready for children right now. I feel like I'm getting all these weird symptoms but it's all in my head trying to freak me out.