Should I be concerned?

I'm very new to this app. My last period was 2/17. According to this app I would have ovulated the first week of March. I had sex on the third which was unprotected. We normally use the pull out method with no problem for the past 4 years. But he got a bit careless. We attempted to try anal in the middle of sex but I freaked out and decided not to at the last minute. He attempted to put it back in my V but didn't make it -_-. When he came I felt most it in my butt crack and didn't think twice it could have went inside of me. My period isn't due until the 17th, the latest the 20th. Should I be concerned?