My wife has just given birth a few days ago, and has been told not to lift anything much heavier than the baby for several weeks (natural birth, not Cesarean). So bear in mind that after the birth there is a good chance that you shouldn't/can't be lifting a deep for some time after the birth. Also, the last couple of months, my better half was exhausted. So I suggest if possible you plan your hive management so that you don't need to do any heavy lifting or laborious work for the month or two before and after the birth.
It's unlikely you'll fit into a bee jacket, I've never seen a pregnancy jacket - there's a niche market!! I guess a veil might be the only option.
Best of luck, let us know how you go, and when your little beekeeper arrives :-D :-D