No Sleep...

Well it's 11:30 pm and Alex does not want to sleep. Well at least not in his bed. He spent the day with family and didn't take a nap so he is no showing the signs of being warn out yet fighting the man, if you know what I mean. I hate that he is asleep and being carried to bed then screaming his head off. Why is it times like this that break my heart. Yes, I know I need to just leave him and let him cry it out but man I can't listen to the screaming! Any suggestions anyone as to how to deal with something like this?