Relationship- babies.

So... I just got in to a relationship last week. We have known each other for over a year so he's not a random guy, but he wants to have kids already. I mean so do I, but I'm scared that we are trying way too fast? He's already went inside me twice within two days.. Idk am I being dumb? I don't want to think I am.. :/ I'm just super scared. Opinions?