Sorry TMI but I need help

I have had diarrhoea since Saturday! To start off with I had chills, body ache, head ache, feeling sick and stomach cramps! I still have a head ache 5 days on and I still have diarrhoea. I've been drinking water to stay hydrated and to try stop the head ache! I tried Imodium but that didn't work! The doctors will not see me as it might be contagious! I have passed it to anyone in my house so far. What can I do!?