Hello everyone) We're lying in the infectious hospital. They're giving…

Hello everyone) We're lying in the infectious hospital. They're giving us antibiotics. We got into the hospital with high fever (it didn't drop for 3 days). Today is day 5 in the hospital, diarrhea started. If yesterday was average stool with mucus, then today it's almost water. What should I do? What could this be? A caught infection? Or a reaction to a 5-day course of antibiotics?