Aimee went through a stage of being like this for about 2 weeks. It was torture!
We were so confused, as she had always been a great sleeper. We had to do CC too and it was horrible and so upsetting.
After a week of being really tough and practically ignoring it, she went back to normal.
Also, he may have a little virus or something that you havent noticed. Aimee has also had the odd one before with no particular signs, and then after a few really bad nights, she has a temp, then it all comes out and goes away again.
I hope it picks up soon hun xx