I recently tested positive for morphine when my doctor drug tested me for my hydrocodone. I have never taken morphine. How is this possible? I

Codeine. You probably took some codeine, maybe a cough suppressant. Codeine is metabolized to morphine, hydrocodone is a synthetic opiod unrelated to morphine. Heroin and codeine metabolize to morphine and there are several byproducts of metabolism that can be tested to pinpoint exactly what a person took even though they metabolize quickly.