DD did a very similar thing at this age. She went from 1 bf a night and straight back to sleep, to waking up 4-5times a night and the bf would not get her back to sleep - she'd comfort suck (it definately wasn't a feed) and then be bright eyed for 45mins After trying varios things, we just had to change how she was settled when we put her to bed, and also, instead of me going in and her wanting a feed, for a week or so, DH went in to settle her. What we did was put in place a proper bedtime routine, and moved her last feed earlier in the routine, so I think it was something like dinner, bath, pj's, feed, story, bed. We put her down awake, and then sat and patted her and shhed, if she cried we'd pick her up, calm her down and put her in the cot. The first night I think it took about an hour, but with minimal tears and then by the end of the week, it was about 20mins. DH would do the same in the night, so pick her up to calm her down and then pop her back down.