We've had diarrhea for two days now, dark green and with foam. It was …

We've had diarrhea for two days now, dark green and with foam. It was normal in the morning, but throughout the day it happens 2-4 times, maybe more. Nothing else bothers us. We're on breast milk/supplement feeding. Where do they put you in the hospital with such thing in an ordinary ward or infectious one? And who treated it? Maybe we can avoid hospitals ?