Please help. She is coughing constantly and has been for over a week, day and night. No other infections or virus. No temperatue. She aches from coughing. I have tried chesty cough medicine to loosen it withy no effect, steam, karvol,vicks and nothing helps. What could be making her cough? I feel so sorry for her and helpless. She is in her last few days of primary and I want her to enjoy them.