My daughter is 4 &1/2 years old. Normaly she has cold and cough problem. But from last 4 months she has started coughing at night. Hole day she used to be alright but at night she gets cough. We consult a dr. and they said that she has child asthama. But she never had brathing problem. As huf puf kit is also not giving relief. we consult another dr. he said she might be having whooping cough. We did blood test, xray. Reports are normal. What to do