Good to quarantine just to make sure. WC is bacterial the first symptoms are like you are getting a cold but it's not a cold it's the pertussis bacteria secreting it's mucus and attaching itself to your lungs. The cough usually starts from there. In little ones you don't always hear the classic whooping sound either. That's the beauty of the AB's. They don't stop the WC illness because by the time the cough is present it's too late but they kill the bacteria and make it safe to interact with others again.

Hope all goes well. Unfortunately your DD is still young enough that this could really knock her around abit if it's a severe enough case. Any idea who she would have contracted it from. Might be an idea to let them know so they don't infect others either.

Hope everyone is well again soon.