Oh PZ, I'm sorry you're in this situation. My dd was like that too and I know those feelings. I used to imagine throwing her out the window sometimes. It's just severe sleep deprivation, and you can get through this.

Basically you have two options. Try and change the baby, or try and change what you do to cope with her waking. Where are you living? Are you on your own?

If you need to change the baby, I would also recommend the no cry sleep solution (I can send you my copy if you need). It's good advice, centered on baby's needs.

If you can change your own sleep, I would recommend someone take dd for a few hours each afternoon so you can sleep. Is that possible? You need to catch up big time. At around your dd's age I was loosing the plot (except she did that from birth) and I was weeping all the time. Only sleep helps. I went to visit my family in the country and slept and slept and slept.

This too shall pass. I am currently up for hours on end with a party animal one year old! They each cope with developmental changes differently.

Thinking of you!