I have had a dry cough for just over three months and for 2 of those I have breathlessness.  Some days are worse than others. It doesn't affect my sleep. I had a chest X-ray which was clear and from my GP persoective it's a case of being on a wait list to see the practice respiratory nurse. I'm scared this could be lung cancer. Both my parents died of it but they were smokers. I have never smoked.   Any advice for me. I'm very worried.