hi there
First of all congrats ON BOTH the impending arrival and the house move - both v exciting.
We did this - sold when I was 6 months pg -
we arranged a super-quick exchange on proviso that we would wait until after the baby arrived to complete.
This was DC1 so life was a little less hectic I must admit than you will have it BUT you have plenty of time.
We worked out 4 weeks from my due date - i.e. 42 weeks plus a fortnight to get arses in gear- which didn't allow lots of CS recovery time (I didn't need it) as the completion date. Actually DS was exactly a month old when we moved. Movers did most things - I just sorted baby out (a sling was invaluable) and wandered round with my clipboard bossing people out.
We packed everything except the kitchen ourselves (got the movers to pack that) and did it bit by bit - labelling painstakingly every box and also numbering and making an inventory on the computer so we knew where things were. We then stacked it all in one room out the way - things we didn't use got packed first and unpacked last (e.g. Xmas decs, old text books).
Can you get g/parents or someone to take your DC1 for a bit before and during the move so that you can sort a room out for them? And give you a bit more "space" to get organised?
From what i've read things that make DC feel happy about news places are key toys, bedding, familar things.
I have seen lots of moving house tips across MN - have a search and there are loads of practical tips - how to do bedding to save hassle, getting takeaway menus etc etc, don't pack kettle/corkscrew etc
HTH And good luck with it all