What Causes Pressure In The Chest Along With Runny Nose And Cough?

I have multiple symptoms and I have had various testing done. They have not figured out what is wrong with me. I had a head cold in December, it migrated to my chest and when the cold was gone I was left with a heavy feeling in my chest. I have had X-rays and CAT scan of my chest which showed spots in my lungs. The pulmonologist does not think the spots are related to my symptoms. I have tried nasal sprays and now an inhaler also Zantac. Nothing has relieve the symptoms. I have a continuous sinus drainage, cough, heavy chest, almost like a panic attack feeling, a sore throat off and on, and a headache off and on, I feel tired and lack of energy. I am normally a very energetic person. I am 59 years old and weigh a hundred and one pounds. Until I got that cold my help was excellent. What do you think I may have?