We just had a week of this that seemed to coincide with a bit of a cold - back to much more normal now.
For the cuddling - think about biting the bullet and arranging your bed so he can't fall out (or can't hurt himself) - put the mattress on the floor if you have to for a while. Then you can at least get some sleep yourself (which is probably the most important thing).

This is also a stage where separation becomes a big issue for some kids.