Hi there,
I don't have much advice, but all I can tell you is - it's a developmental phase and you just need to get through it.
We had the same time when DS started walking and it lasted 2.5 weeks I think. They just need to proccess whatever is going on in their brains:/
Comfort him as much as you can, talk to him explaining that he needs to lay down and sleep, that you're there...
Hope it gives you the light at the end of the tunnel <hugs>