I have a chihuahua that is going to have pups any day now, not sure what to expect. Help please.

I'm going to be kind here - if you don't know what you are doing, what to expect, you should not be breeding your dog. I'm not alone in this opinion. https://www.askmehelpdesk.com/dogs/how-get-blue-daschund-breeding-393532.html

However, now that the dog is already pregnant, here's the info you should have: Giving Birth to Puppies (http://www.marvistavet.com/html/giving_birth_to_puppies.html)

Shouldn't you have found out this information BEFORE she was due... not days beforehand.

There are a LOT of things you need to do before your dog gives birth.

First... call your vet and have an x-ray done so you know how many puppies she is having and also to make sure she is in good health.

Second... Put your vets number in speed dial and make sure you have the number for an emergency vet on hand. An emergency c-section if you run into trouble can cost up to $3000... make sure you have that money BEFORE she whelps, some vets will not do the operation without payment first.

You will need:
A whelping box
Blankets and towels
Liquid antiseptic (Betadyne)
Cotton
Scissors
Scales
Thermometre
Heat lamp

There is far too much information for me to type out here so go to this website:
Newborn Puppies....Care of the Newborn puppy (http://www.chelsea-collies.com/newborn.html)

Good luck, and don't forget to get her SPAYED once the puppies are weaned.