What should i do? i have had the runs going on my 5th day. every time i eat it just goes right through me. what could this be?

Gastroenteritis: You have either a viral gastroenteritis or infection with e coli, shigella or salmonella. Since you had it for five days and it is not getting better, you should see your family doctor and may need stool culture to rule out bacterial infection meanwhile drink fluid especially electrolyte containing fluids to prevent dehydration and dont eat food till diarrhea is better.