Rumbling stomach,even when sleeping at night, on epigastric& left side of abdomen. extra gas-farting& belching. daily healthy&long bowels, but sometimes a bit softer than usual but still solid and long. sometimes i fart then mucus comes out?

It appears that you'rer experiencing excessive gastrointestinal gas formation but have little difficulty moving it down the intestinal tract& expelling.it.Soft stools and some mucus in BM's suggest irritable bowel syndrome. Avoid gassy foods& beverages and harsh roughage. Take simethicone 1/2 hour after meals to prevent gas buildup. Don't force yourself to belch as it makes you swallow air.