I would also be worried! However, if you trust a person to be in your house then they must have something about them that makes them trustworthy in other areas? Not comparing your possessions to your children, but anyone that comes into your home is a worry so the fact you have her there without a w...
You should try some great local agencies. Try http://www.penniesnannies.co.uk for a great selection of nannies.
They also have great guidelines on how to choose a nanny that is right for you.
Hope you find who you need, good luck
