Almost 3 year old waking at night for chocolate milk and will scream and cry refusing to go back to sleep and wake the whole house until he gets it even if that’s hours and hours and idk what to do

Might be dumb but have you offered water instead? You kinda gotta be firm and tell them it’s water or nothing, if you keep giving in to the screaming and crying they learn that gets them what they want and it’ll only get harder to get them out of that cycle as they get older as they get more sneaky with the tactics to get what they want. I’m sorry you’re going through this though especially with being pregnant as well :/

I would look into healthy options…. maybe unsweetened almond milk, 100% cocoa powder, mixed with monk fruit? Or kids protein shakes. Or you could make it start tasting bitter🤭 so he no longer ask for it.