Firstly Calm down Cass!
I was your age when I had my first child and I clearly remember every word you have just said...my thoughts on the subject are this.If he wants to act like a baby let him be one. Tell him when you are having U/S, docs appt.everything and just leave it at that, don't go on about him coming or he will refuse.
If the know at alls say anything tell them its his turn to decide what he wants because you are tired of making all the decisions, turn everything back onto him, without making it look like you are.