my bb also. she needs the dummy before sleeping, after she sleeps, i will take away the dummy. when she cries at mi-night, the dummy can stop her for most of the time, occationally she needs to drink milk before she can sleep again. i am afraid she need the dummy for the sense of safety.
really can't find out the real reason, would it be that bb needs some vitamin supplement/calcium? i am going the give her some bb vitamin supplement, so see if this can solve the crying problem.