How to make my nausea go away?

I got sick on wednesday night: Throwing up, etc. with a fever. My fever is gone and I haven't thrown up since thursday morning but I'm still so nauseus and I can't take it anymore. Also, I feel very weak, am sleeping a lot, and am reallly thirsty. I have been drinking ginger ale, gatorade, and water, and have been trying to stick to eating light, plain things but nothing is working.