makescakes sorry you're feeling a bit feed up. My DH does the same, I think it's quite a transformation for them to get their head round, plus I suspect that they feel a little helpless.
He is probably getting nervous about the birth, the new baby, the sleepless nights and the uncertainty and unknown and uncontrollable element of it all. My DH definitely is!
I'm not sleeping either and i find it kind of stressful as I am exhausted and I know that I should be sleeping as much possible. I'm not going to get much sleep with a new baby, sleepless nights feeding and all the extra effort I'm going to have t put in to make sure that my other two don't feel left out and/or confused. Let alone squeezing in school runs and cooking and everything else. It's really very daunting. Plus, I work for myself from home.
Third time round, my body feels like it has gone off track ten fold. I'm bigger, my circulation and veins are terribly painful by the end of the day and like you I just long to get into bed and stretch out and sleep "on my own", but then at t he back of my mind I think:"This is the last time I will ever have this experience and I should savour and remember every moment....."
I'm also more than desperate to meet baby and see if everything is ok given the bumpy ride we've had and continue to have. Throw in the hormones and t'daaaa!
Have you tried sipping peppermint tea an hour before you go to bed? Helps me a little...