Don't tress yourself out, just let him go. All the messages and phone calls are pushing him further away. You are better off without him. Try to move on. Enjoy the rest of your pregnancy, and get ready for that little baby. Forget about him, he doesn't deserve that loving baby in his life.

I have a feeling once you do leave him alone, he'll start calling you.

I can't say it enough save your messages and e-mail. You will need them in the futur.