I don't even want to ask...

I have a dr appointment at the end of the month to get put on birth control. However, my boyfriend and I were fooling around last weekend and he was inside me but only for maybe 5 minutes before I got too scared. We didn't have condoms or anything and I didn't feel safe. It was during ovulation but like I said, it wasn't even 5 minutes and he didn't even cum. But I know pre cum is a thing. I'm trying to learn more about sex in general so I don't really know when pre cum happens?? I'm starting to become more in tune with my body now & paying attention to cm so (this is going to sound stupid probably) but is there a chance I could be pregnant? I'm only asking so I can calm my mind. My period isn't due for another 12 ish days.