I am so sorry! They didn't do an IV or anything? You need at least some fluids especially if you are sick to your stomach as well! Do you have anyone who can take you to your appointments? I can't drive right now either due to how sick I have gotten and people are very irritated about having to help me but it's better than getting into an accident!
Can you try drinking like Gatorade? It has electrolytes and calories so at least you would get some of that in your system even if it doesn't stay for long.
It's been bad here too uncontrollable diahrea even with taking Imodium AD but I have been drinking boost shakes to try and keep up on some protein but the shakes just make there way our too. Does your poop seem to have a lot of mucus? They had me take a stool sample and it was basically all mucus which was scary.