Have been experiencing gas, acidity and heartburn lately. when i drink cold water i can feel water passing near my left ribcage which seems very odd. Motions are regular but i have to go twice or thrice to completely relieve myself. When i cough jelly like / fibrous white mucous comes out of stomach and helps relieve congestion around esophagus. upper back pain after waking up in the morning. When i exercise (aerobics) i pass gas which is very comforting.