I agree with PrettyKitty and Marisspossa, the symptoms are too serious to do the wait and see with your cat.
I am thinking some kind of poisoning, possibly carbon monoxide. This sounds life-threatening, please do not delay getting kitty to the vet.
I second the above comments. You need to take her to the vet ASAP.
Good Luck.
Let us know how she is doing.
definitely get her to the vet asap. could be a number of serious things. good luck!
I'm so sorry to hear about your son's cat. Could she wave ingested something in the storage place? I would definitely take her to the vet asap!
Hope she feels better soon! Please let us know what the vet finds...