I think go get her checked out . . . they won't think you're silly or anything. My mum works in an Emergency Department and she said they get little babies there all the time and it's fine, better to be safe than sorry. At least if it's nothing, you can sleep easy tonight.

Otherwise give that health nurse a phone call (I think it is 13HEALTH but you'll have to check) and you can describe it to her and she will let you know whether she thinks you should go to ED or wait till tomorrow.

I hope it's nothing and just your little DD keeping you on your toes