Just quickly replying, sorry haven't read the other posts, I don't have long...

YOU HAVE NOT DONE THIS! You're following your baby's needs and giving her what she needs, you're doing great
She will learn to sleep!! The book won't tell you that or you wouldn't read it and they wouldn't sell many would they The methods in there work great for some bubs, but not all.

My DS1 slept with me until he was 2 then just decided he would sleep on his own. He still came into bed with me sometimes through the night, but he just suddenly started to sleep on his own.

DS2 was a sleeper from the start, day one, put himself to sleep anywhere any time never an issue.

DS3 has only just started to sleep (almost) through the night now at 2. We removed all additives from his and my(still BF) diet and MAGIC! Sleep!! He still feeds to sleep for his day sleep and sometimes needs a BF if he wakes too soon. But through the night if he wakes, which is usually only once, maybe twice, and he'll go back to sleep himself, sometimes after a little cuddle, or he might just reach out to touch me and he's all good. We still co sleep btw, same as you it was just too much when he was waking every 2 hours at night to be getting up feeding settling then going back to bed only to be doing it all again in the blink of an eye, and all night.

I hopw you get some rest soon I know what it's like

When DS3 was younger he liked to be walked and rocked, I ended up getting a rocking chair to save my back.