I wish you the best of luck J., this is a tough situation (and exhuasting one) to be in, especially with a little one on the way!
I was lucky- my daughter from the day she was potty trained did has not had one accident yet.
My son- different story all together! He wore pull ups for a long time at night... the key we found with him was absolutely no liquids within one to two hours of going to bed (unless of course he is sick and needs extra fluids). It is a tough one especially if they are used to drinking at night.
We started our daughter like that from the beginning and now she just knows the routine. If they ask for a drink we allow a small "whistle wetter" (literally one to two sips of milk) in a small cup and that uses calms their requests.
Again, good luck and I hope you find something that works well for you and your family.