Liquid diarrhea for 5 days now, thought it was bad food, now not sure. had smaller formed stools the other day, but its back to just liquid? concern?

Diarrhea: If the diarrhea lasts for longer than 2 weeks, contains blood or there are any other health concerns see your doctor. Keep a record of your diet.

Diarrhea-5 days: Yes you should be concerned. Call your doctor asap. You may have a bowel infection that needs treatment. Meanwhile be sure to take in a lot of liquids to avoid dehydration.