Bottle and sleeping probs

My little girl is almost 6 months, she has had problems with drinking her bottle for a few months now, a pead was no help at all we have tried EVERY different kind of formula possible, soy, lactose free, one on a script from a pead, chaning brands etc she just wont drink a whole bottle. Some days she will drink 2 whole bottles and then 30 mls of a few and thats it, she has breakfast lunch and dinner but lately isnt interesrested in anything i give her. Does anyone have any suggestions?

Then sleeping... she was in our room in her cot untill a week ago, we put her in her room, i have to rock her to sleep when its bed time (any tips on how to get her to put herself to sleep would be great!) she goes into her cot about 8 and usually would sleep from 8-7 but now in her own room she wakes up at 12 and wont go back in her cot i rock her back to sleep and as soon as i put her down she wakes straight back up and this goes on aslong as i keep doing it, she just wont go back down in her own room so she comes into our bed because df and i both have work the next day.
How do i get her to settle herself to sleep and get her to sleep in her own room?