Did your child get the vaccine? The reason I ask is that even with the vaccine, they can get the chickenpox, but it's not as bad.
You do need to take your child to the doctor to verify the diagnosis. I'd wait until tomorrow. Give her Tylenol (no aspirin products because of Reye's Syndrome) and don't let her run around. You need calamine lotion in case it really is chicken pox.
As far as your husband is concerned, you need to keep him home until you know for a fact that your child really has chickenpox (stinks if you had plans for the holiday.). Tell him to get done what all needs to be done, because if he DOES come down with it, he's going to a LOT more sick than your daughter.
The doctor will tell you to watch for signs of secondary infections.
Oh, and make sure that you tell them what you suspect when you make the appointment. They will want to whisk her away, as soon as you come in the door, and put her in a room that they don't put infants into.
If it's not chickenpox, you'll be lucky, but proceed right now as if it IS, and keep your husband and your child in your house.
Good luck,
Dawn