Freaked

I was fooling around with a guy I’ve known for years, we didn’t have any protection which he knew, he asked if we could have sex and I said “I wish we could but it’s too risky”. A few minutes passed and he had his head between my legs and was fingering me, I had my eyes closed. Next thing I know he’s on top of me and inside of me. I was surprised so I didn’t say anything, he pulled out after a minute or so. I’m not sure what I said that made him think I meant “go for it” but I’m a paranoid person and I already have a son I’m raising on my own so of course now my mind is panicking probably unnecessarily about pregnancy, according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> I’m not in my fertile time, it’s 5 days to my period and he didn’t finish inside me...chances of pregnancy are very low right? Like almost non existent? I just need someone to reassure me I guess!