My DD had previously been a great night sleeper until about this age. She would wake a lot in the night and take forever to get back to sleep - it was driving me NUTS!! It sounds odd, but we took the sides off the cot. I'd lay down with her to put her to sleep if need be, with cuddles (although our main problem was during the night). But in the night she would come in with us if she woke. Some nights she thought it was play time and I'd take her back to her bed (sometimes cuddle with her). If she lay quietly she could stay with us. She was night-weaned during this, but sometimes would want a drink of water. Cuddles were all that worked for us. And quiet dark rooms.

It must be a phase. Just about does your head in though, doesn't it!!