Have you tried the postnatal ward?
If you have some milk expressed, offer it from a tiny cup or a syringe (from chemist) to make sure she's getting enough. Is she very sleepy?
It's not quite an emergency yet if she fed at 2.30am, don't panic.
These things always happen on a weekend eh?
Verona Hall is a local independent MW: [www.veronahall.co.uk