Pregnant early in a new relationship

Moms,

First off I’ll start with this, I’m always afraid of change,especially good changes, or new ones. I already have a little boy and recently started a new relationship about 4 months ago, and we just found out a week ago we were going to be parents. My thing is, since finding out about the pregnancy, we’ve fought a lot and I put my foot down because I was tired of the fighting and needed my space(he stayed with me for a week) when normally there’s time away before we see each other(we live in different towns). He pretty much told me last night that if it happens again he’s just leaving,because he doesn’t do the whole “break” thing even though it wasn’t a break or anything... I’m just at a loss and he keeps saying I wanna see you and everything and I’m pushing it back because all we did when together was fight... HELP!!