Hello welcome to HCM,
You are suffering from diarrhea
either by food poisoning
or due to foreign body as u said piece of dental floss. abdominal bloating
and cramps are common in diarrhea nothing to worry it will take 2 to 3 days to cure. In diarrhea there is lot of fluid and electrolyte loss (sodium and potassium )so try to have 8 glasses of water in between your meals and even electrol powder. eat solid food stuffs like bananas, apple, rice ,fruit juices without pulp, yogurt helps in good digestion.Antibiotic like ofloxacin
twice daily gives relief. apart from this consult your doctor if it gets worse, get well soon .