He just walked out.

I don't know what the hell happened. I mention sex, he gets pissed off. I leave the room to go to the bathroom and I come back out and he's fucking gone. He won't answer his text or his phone. I don't know what to do. He has the car, I'm like 18 hours from any friends or family and I'm 21 weeks. Part of me wants to take this baby and just run away. We don't deserve this. 
Update
No one to call because this just puts him in a bad light. He did come back home and now he's saying that he thinks we should divorce. He's mad at me and he doesn't want to deal. I've been dealing with this shit on and off again for 3 years now. I'm so over it. I love him but I don't think me or his child should have to contend with his emotional instability for that reason alone.