Hi there. I am a disaster and in full fledge panic mode. My doctor is over seas and won't be back until Friday, so thought I would ask here. I have zero signs of a cold and feel fine, but I feel like when I lay down i start to feel a cracklig in my chest and neck area when I take a deep breath. After a few deep breaths it goes away. I don't have a cough or anything. I have convinced myself this is lung cancer or some type of tumor. I have taken so Many deep breaths to try and hear the sound that I have made myself see spots!! It was really bad the other night we were on vacation and I got up and I could feel the mucus in my chest then after one breath it went away. I have been feeling this for a few weeks but it's really caught my attention now....I do have reflux occasionally. Other than that I have given myself days to live. Has anyone ever had this? Please help me.