Yesterday I had to come home from work early as I felt very faint, had a headache and a slight pain in my back (only right hand side) when I breathed in and out, belched or sort of hiccuped. I went to the doctor and they said they couldn't hear anything in the lungs so just gave me anti-inflamatories (naproxen). I've now been taking these since yesterday afternoon and have developed a dry cough and nauseas feeling (not sure if it's side affects of tablets?) - although the pain has been relieved. Also feeling lethargic, and having hot and cold spells.