I cant offer much in the way of advice, As i have a Mr 3 who sounds as though he could be your sons twin!! It is so so exhausting, and im not pregnant, so huge hugs for you.

We have an open dining/lounge/kitchen area, so no keeping him out of there! But i have had something rigged up so he cant get in to the kitchen, although his latest is to push a chair up to the side of it, climb up and jump over Whenever i leave the room all my chairs go up on the tables so he cant get them and at night, everything climbable goes up or out! I have a safety latch on my fridge and freezer and small slide bolt on my pantry, spare/junk room, my room, bathroom and laundry, i have safety gates to keep him away from the front and back door as he will let him self out, and a safety gate blocking the hall leading to my study as this door has a cat flap so the cats can get to the cat run and he will go through it and throw things out it!! Sort of sounds like fort nox but i was at a loss, and you know what?? It still hasn't stopped him!! And Mr 2 is starting too!!

Good luck, i know how frustrating it can be, hope he settles down soon, mine too! Oh and im sleeping in my loungeroom at the moment too so i can hear him as soon as he gets up!