Suggest Treatment For URTI Causing Breathing Difficulty And Upper Abdominal Pressure

Hi, I m a 62 yr old Man, who s contracted a nasty upper respiratory infection that seems to be taking an awfully long time to leave, about 3 weeks. it continues to manufacture lots of mucus and excessive coughing. However, that s not my concern, just some background to my current condition.My concern is, I m now experiencing difficulty in breathing, along with a significant amount of pressure in my upper abdomen, my lower abdomen seems to be distended, from under my chest to my waist, and I feel extremely bloated after even a small meal. I am a bodybuilder, very muscular with a reasonably low body fat count about 12% off season, so its not due to lack of fitness, just very uncomfortable, which hinders my training.