Can I get pregnant?

Welllll, here's my concerns😕

So my boyfriend and I were having sex and I was on top and as I was lifting off he came. And then was fingering me since I hadn't came yet and he said he isn't really sure if he got any in me before I had lifted off or not but I'm worried that if he got anything around the area and it was just sitting there that he may have pushed it in while fingering me ? Opinions please!!!