This can be diverticulosis. Diverticulum are the blind pouch where food can stagnate and bacteria can grow. This gives the gurgling sound and diarrhea. Another possibility is irritable bowel syndrome. Gall bladder stones may also occasionally be responsible for these symptoms. Having said that, any change in bowel habits or symptoms persisting for some duration, need a CT scan and a colonoscopy (camera exam). Following may help you, meanwhile you are investigated;
2) This may help;
a) Bismuth subsalicylate
b) Activated charcoal
c) Simethicone; (Maalox, Mylanta); Simethicone causes gas bubbles to break up.
d) Beano; contains an enzyme (alpha-galactosidase), which helps to breakdown certain complex carbohydrates.
All are available without prescription.
Avoid foods that appear to aggravate symptoms. These may include milk and dairy products, certain fruits or vegetables, whole grains, artificial sweeteners etc. But this is based on the personal observation for the aggravating food.
Discontinue the following if you do them;
1) gum chewing,
3) drinking carbonated beverages, and
4) gulping food and liquids.
Please feel free for your follow up questions.