babies often go on "strike" when there is a transition.
the good news is; she will eventually take to the bottle, whether she does it reluctantly or not. the bad news? there might be a few rough days before she gives in. DO NOT panic that shes not getting enough to eat. what will likely happen is that she will take limited amounts while you are gone, and she will want to nurse a lot when you are home. there is nothing wrong with that, and at her age you should NOT deny her ANY time she wnats to nurse. this is important, though exhausting.
try sleeping together. this worked for me and my son. we didnt start this until he was over 2 months old, but when i did, i never looked back. you barely wake up when baby needs to nurse, theres no crying or screaming, baby just gets on there and nurses and you both go back to sleep. its beautiful. :)
if sleeping in the same bed is uncomfortable for you, try just putting her bed in your room next to your bed. then you dont have to get out of bed. the temperature of our feet is sometimes what can get us and keep us awake. being able to get baby while staying in bed is going to help you tremendously.
www.askdrsears.com
www.llli.org - search for a la leche league group in your area or nearby town. it is so worth it. they will have real moms there who have likely been in your place, and will be able to comfort you and help you out with everything from this issue, to my issue that i had when my son was about 16 months; milk coming out his nose!! LOL
anyway, dont do things with myanna just because they worked with your other 2 kids. myanna is her own person. she has her own needs nad her own personality. be sensitive to that. whatever you need to do, dont feel shamed or guilty. follow your heart. typically, us moms already know the answer to our problems, we just get afraid to follow through because of all the "experts" out there who tell us we cant do things a certain way. let me tell you that YOU are the expert on your child. your child does not have the same set of needs as anyone else. you have to be the one who makes the decision about sleeping, crying it out (please dont!), feeding, everything. and you will be the one who has to deal with your choices. not the doctor, not your parents or inlaws, not me, YOU. so YOU are the one who makes the final call. follow your heart, not some "expert". you are the expert!