Help a pregnant mama out!

My first two children never had sleeping issues at all, my third child who is 18 months old and she will go to sleep at her bed time witch is 9pm and wake up at midnight and stay up

Until 4am even when she’s not allowed out of her bed. That’s the first issue second issue is she’s learned the word hot so everything here lately is hot. Even if she see you pull it out the fridge or freezer to eat it’s still hot and she refuses to eat it! She use to have a great eating habits and out of no where it’s stopped! What can I do!