My dog,8 weeks,is shaking,but not hysterically bad,I can't get a hold of the vet,what can I do for her

What kind of a dog is it?
How much is it shaking? Constantly? From time to time?
What colour are its gums? Press on its gums by it's canine tooth. How long does it take for the colour to return? Does the gum feel tacky at all?

Call around for vets. Though most will not be open, some should have an emergency answering service.

It's a chihuahua,not constantly,she's lying down but its not going away

Chihuahuas tend to do a lot of shivering so it may not be abnormal.

Do the other things I asked if you can.