Lou I agree with Frankel, keep every single text and email he sends you, anything he puts in writing.
Yes, you were very restrained in your response to him, but I really wouldn't make any contact at all.
You need to regain control of this situation, and by NOT responding when he wants you to, you are (a) creating a timetable that suits you and suits your current feelings about everything, and (b) minimising your exposure to his endless hurtful bullshit.
What would you have said if he had picked up last night when you called? More to the point, what would HE have said? You're already dreading any email you might get from him today - would you have been able to keep your composure if you'd heard those words actually coming out of his mouth?
As hard as it is to just leave them alone when you still have so many unanswered questions, and when you are so desperate to find some kind of reason for their behaviour and sniff out any evidence of humanity, you really need to cease contact with him.
HE needs to speak to you, HE wants to tell you what he thinks about the pregnancy, HE wants to justify where he is and what he's doing, HE wants to spin more of his web of lies with you.
What do YOU need? Any of the above shit in your life? Nope, probably not. You need to forget his head-fuckery and focus on the steps you're taking to protect yourself.
Opening yourself up to communication with him is the opposite of protecting yourself...