I m having a hard cough with pain in my chest when I cough. Sometimes I feel like I m breathing thick air. I just finished my 2nd antibiotic, but still have this terrible cough. I was treated for a sinus infection because I was coughing, mostly at night when I lay down, but now it s during the day and at night. I don t have a fever and the doctor listened to my chest but didn t hear anything??? My right ear had fluid behind it, but still hurts, especially after I do my saline nasal wash at night. I only have clear thick mucus. Sometimes my chest burns and sometimes I feel like I may be having a heart attack or something. My chest doesn t feel like that all the time, just several times a day while having a hard coughing spell. Can you help me please? I had sinus surgery a year and a half ago.