I don't want to debate on this mother's thread. I just wanted to point out that YOUR experience does not dictate what would be right for every baby (re: "After 4 months old you have to find a way to teach the baby how to put herself to sleep").
Is it possible that you're maybe trying too many philosophies at once? All these sleep books give conflicting advice, you know? Maybe lstep back and look to your baby. What does HE need? What things make him comfortable, and help him sleep? Then, move forward from there.
Most importantly, enlist the help of your family and friends. Find someone who can take care of him for a few hours while you catch up on your sleep.
Furthermore, attachment parenting is not about "letting baby do whatever he wants" or "get(ting) up 10 times a night to nurse". Attachment parenting is about listening to your baby, and meeting baby's needs.
The advice you shared is one expert's advice. It doesn't mean that it's a cookie cutter, one size fits all, recommendation for all babies. In many cases, the advice causes more heartache than anything.
I thank you for sharing your experience, but I urge you to be cautious about HOW you share it.
And, I'm really sorry you're having such a tough time right now and hope that things look up for you soon! I hope that you will read the links I posted for the OP. There is some information there that will give you some tools for coping, and some hope for more sleep soon.