I just wanted to echo what Jane said, 3 night feeds in a lo this young is really quite normal! We had a dream feed plus 2 other night feeds for quite some time (past 4mo if I remember right!).
In Tracy's book, she mentioned, at night baby will hardly wake for food, they just wake as a habit.
A couple things about this... From what I remember, this was really referring to older babies. When babies are this young (especially breastfed babies) they truly do need to eat through the night. It is when babies get older that babies can wake habitually for feeds (learned hunger) rather than actually needing the calories through the night. Another thing is that breastfeeding knowledge and research has changed a lot since Tracy's untimely passing, and some of the recommendations in her book no longer jive with our current knowledge. For example, breastfed babies generally can't do a 4h feeding routine until well past 4mo, sometimes not even until the introduction of solids.
Have you gotten a chance to read
http://babywhispererforums.com/index.php?topic=98183.0 ?
Re: the crying at 2am, are you dealing with reflux at all? Or possibly an ear infection?
With sucking the nipple, are you bottle feeding? A paci might be better, with sucking on an empty bottle nipple a lot of air can be swallowed and cause painful gas which might be making things worse instead of better
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