You poor chook.

The other girls have given you some great advive to be going on with.

I haven't experienced what you are going through, although Olivia was a shocker for similar type of non-sleeping from 4pm-10pm from birth to about 4 months).

My suggestion would be, yes, to go to a sleep school if that helps her get into a better routine for sleeping in general. It may not solve all your problems straight away, and only go if it feels right for you, but like Nikbrad said, some babies who get a lot of sleep in the day then sleep better at night.

Best of luck, & I hope you get some decent sleep soon........