Hi and WELCOME

!
If you think your baby has a cold, you have to get to the vet ASAP - especially when they are puppies bc puppies can go downhill fast, sadly. She may have kennel cough - was she given that vaccine? Giving the vaccine can actually cause them to get kennel cough. I actually don't believe in giving that particular vaccine, but you have to make that decision on your own learning....which takes time (at least it did me

)!. I really would get to the vet as soon as you possibly can bc in puppies, Kennel Cough can turn into pneumonia quite quickly - and that can be life threatening.
Is she eating/drinking? Is she lethargic?