I would say she means coughing.
I would suggest getting the room checked for mould, dustmites, etc. I'm sure if you contacted an air quality company (phone book or enquiring through your doctor, health department..etc)
Can you explain the room....flooring, bed (old, new, mattress...etc), bedding, curtains, walls, etc.
Is your daughter better since moving?
It seems it would be the room if your daughter isn't coughing anymore.
It's all a matter of perspective!