So I Have Been Not Feeling Good For A Week

So I have been not feeling good for a week I am very weak it's even hard for me to walk I just wanna fall, I'm dizzy and I went to the ER and all they said is that I could be dehydrated. And so the next day which is today I still can't walk I have a cough and my forehead is really numb and I can't sleep because it feels like I shaking. I've been drinking of fluids. But now it's hard to feel anything in my fingers? I don't know what's wrong with me.