If a person has headaches, vomitting, sleepness, diarrhea, confusion, and kidney and liver problems what could they possibly be poisoned with

They most likely have food poisoning

Explanation:

When you eat food that has passed the expiration date and has small pieces of mold and other bacteria, you start to vomit, have diarrhea and get confusion. You are also affected with sweating.

Not sure about kidney problems though.

Hope this helped :)