Amani - I am finally jumping in after reading the whole thread (took me 2 nights )
Firstly, Get your arse back to the Jan thread, we do miss you you know.
Secondly,
DD started sleeping through from very early on but once we moved her to her own room she began a battle, here's what we did to change her back (take what you need from it and ignore anything you don't want to listen to)
We made it warmer (heating and a fleecy bodysuit) we made sure she had 3 8oz feeds (one after breakfast, one after lunch and one after dinner) during the day, we made sure she had 2 naps during the day - one after breakfast (around 10am) and one after lunch (around 4pm) She settled again after 2 nights.
When you bottle feed her how much is in the bottle?? Ie: do you just make up 5oz cos that's all she's been drinking or do you make 6oz in the hope she'll drink some more.
When does she stop drinking? Ie: Does the bottle finish, does she fall asleep.
Naptime - Does she sleep in her cot/somewhere quiet so she is getting her full 45mins/1hr or is she in the front room where she might be having a restless sleep.
Dinnertime - Have you tried her with some more "fingertype" food or is she still puree? Might be worth trying her with the likes of a butty or something - maybe she just doesn't want Puree (DD will not touch puree so maybe your DD is the same and just doesn't find it apertising?)
If you don't want to try CC/PUPD to the letter then don't do it at all as you will make her worse if you just do it half-heartedly. If you don't want to do it then don't feel bad about it just don't do it.
We were lucky in that we could do CC, We did it for 2 nights and she cried literally for about 5 mins each time - no tears, just yelling. If there were tears and she was sobbing we would have gone to her as I hate that sound.
Try as has been suggested taking her out in her pram (leave her in it all night if you have to once she's asleep - as long as it fully reclines flat) This is probably the reverse of what you want but try giving her something to comfort herself with (DD has a winnie comfort blanket) you may find that that will help to settle her, although you may have to wrestle with her to wash it later on (so get 2 )
I go agree that you need to try to stop feeding in the night (I understand its easy but it clearly isn't as you are still up 3/4 times a night) Do absolutely ANYTHING you can for her to not have a feed including a midnight drive!!
I really hope this helps you and that you do come back to us as we are all struggling with one thing or another and are in no way perfect parents with perfect babies.
We're just a GREAT support system for each other.
Keep your chin up and keep smiling.