Hi there my son has a a dry cough now for 4 weeks, ive seen the doctor 3 times now and they say hes chest is clear, last time he went was last weekend.. Ive tried everything, medised, tixylix , steam. vick vapour rub. I dont know what else to do, he not had a cold at all since this cough . I dont know what else to do should i take him back to doctors , i think there getting fed up with us though..Any advice will be great. Thanks cora xxxxxxxx Forgot to say hes 2 years old