Please help.
About 8 months ago I started having alot of clear, salty, slightly whited specked phlem that i've been coughing up. I cough throughout the night, and day. The phlem keeps reforming. I have also noticed that on occasion throughout the day that there is sort of an "icy hot" "menthol-like" feeling when I breathe in (it is not constant. Usually happens in late evening and night, and even then it's not all the time). More frequently lately i've noticed a more difficult time breathing and swallowing sometimes, everyday although as the other symptoms, usually more at night and not all the time. It feels as if there is a lump sitting in my throat choking me when this happens and I feel slight pressure when I try to swallow, although I can still swallow everything. I don't smoke, i'm in my early twenties, and i've been to the doctor's. He's told me that it could be asthma, panic attacks, allergies. I don't buy it. I don't know alot about asthma, but the symptoms don't seem to match, I have had panic attacks, and they are nothing like this, and I don't know to much as to what allergies could do. Can someone please help? I am scared to death.