You must have the flu or a stomach bug of some sort, because hallucination is a common occurrence and symptom.
Also, if you become queasy, I suggest having a product with ginger in it; ginger ale, ginger snaps, etc. You can even eat pure ginger after it's been cooked, but I wouldn't advise it.
By the way, if you're sick, try and stay in bed. Don't get up for anything, unless you need to vomit or it's an emergency.