Have you tried calling Tresillian? The number is in blue book, maybe they can give you some advice or maybe you can take baby in. My friend had a similar problem, and she took him into tresillian for a day.
Could your baby be teething?
Unfortunatelly where we are there's no Tresillian...
I ended up being very persistant with a routine for bub and I've increased her food intake and now if she wakes during the night all she gets is water... she figures it out quickly when she starts driniking that it's all that she's getting... As for teething she definitelly is but I've invested in Amber beads, apparently they're supposed to be super effective, we'll have to wait and see... smile