OK, wow, you've got three major life changes that are hitting at once -- selling/moving, starting a new job, and having your first baby. I have done all three of those things multiple times, just not all at the same time. :) Any one of those can be enough to send the stress-o-meter up to the max, and that's if nothing goes wrong.
My advice in one word is simplify. if it were me, I would get your current house sold as fast as humanly possible. I would hop on those to-do items today and get that sucker listed and sold, and off your plate. Once you are working in a new city and having a baby, the very last thing you will want to do is travel back to the first house to finish up repairs, or whatever.
I would try to move to the new town as fast as you can as well. You won't want to be moving when you are 8+ months pregnant. Nor right after the baby comes. So if it were me -- I would try to do the sell and the move in tandem, both ASAP. If you can't find a great house in the new town right away, just rent for a year. Don't worry about whether your new house is just the way you want it. Just get moved in and set up essential furniture.
Once you are in the new town, if all goes well with the pregnancy you will hopefully have a couple months to start the new job and get settled in there before the baby comes. And then hopefully you can take at least 6-8 weeks' maternity leave? You will want it, if at all possible. The first child's arrival is your 'miracle time'; you literally step through a curtain from one life to another life. It only happens once, so really -- enjoy it. Don't worry about whether you are perfectly ready. Babies are usually a straightforward proposition, and do not need a lot of stuff. When we brought our first home from the hospital we had almost nothing -- just a few articles of baby clothes and a car seat. We stopped at the store on the way home from the hospital to buy diapers. It worked out fine.
With all that said -- buckle your seat belt for a potentially bumpy ride this year. Hopefully all will go well, but things could and might go wrong with any one of these life changes. So my advice would be to move fast, simplifying things as much as you can. Good luck! Exciting times.