I think if she is only just starting to feel well again, you need to wait a bit longer, as when she is totally well, she may stop waking again.
I know how hard it is with broken sleep the last month has been hell for me with sick baby & toddler & 3hours sleep in a row seems like a dream. Can you calm her down by walking her around rather than feeding, so she doesn't get even more into the habit of a feed, that is what I used to do with my ds#1, around that age as my ds was really sick & I didn't want crying to disturb him... it worked, took longer though.