Don’t know how to help my toddler at night?!

My firstborn will be 18 months old on the 27th of this month.He used to be extremely easy to get back to sleep when he woke up at night. You didn’t really even have to do anything - just give him his cup of milk, he’d drink for a minute or two, then he’d hand it back to you and roll over and go right back to sleep. Here lately though he’ll wake up in the middle of the night and scream and cry like someone’s hurting him. Screeching at the top of his lungs, kicking and pushing, tears streaming down his face. I’ve tried rocking him and talking to him and rubbing his back, which normally helps when he’s upset but it does nothing. Somebody please tell me you’ve been through this. I don’t know how to help him. Is this just something kids go through??? via /r/Parenting https://ift.tt/3eASG9E