Oh hun it sounds crap!

You have been given some awesome advice, but I wonder if perhaps you gave yourself a holiday from thinking and trying things. What happens if you just do what you want and dd has to fit around? So she may not sleep in the day and that might improve the night, or she may have one sleep or she may go to bed later.

then in a few days reassess and see if you can see a new pattern...

You're such a great mummy!! Squishy hugs to you!
Anna, sorry i missed your post!
Do you mean just let DD stay awake ALL day and not sleep? I dont think i could do that as a) I'm so tired from the previous night wakings and need my rest away from her and b) she would be sooooo cranky all day with no sleep!

Did you do this with your DD? What happened?