Sounds like the 9 month milestone to me. We went through a similar thing at around 10 months. I really agree with Tan - consistency is key. We night-weaned at 7 months - DD was feeding 1-2 hourly and wouldn't co-sleep and I was sooooo tired, so that was the only option for us. No feeds between 12 midnight and 5am. This worked for us, but then at 10 months the night waking started up again. I'm convinced its a developmental thing, and has very little if anything to do with hunger...
Hang in there, Babe.