On February 3rd I Went Out To Eat At Red

On February 3rd I went out to eat at Red Lobster and had 1 bahama momma mixed drink. On February 12th I gave a 1st visit urine test for drug and alcohol screening and they said I tested positive for extremely high levels of alcohol. Since I wasn't a patient yet I wasn't violating any rules however since I know something is wrong with that test I have to figure out what happened so it doesn't happen again cause I can't jeopardize my relationship with my doctor. He is a pain management doctor and I'm certain he hears lies all the time about positive tests and I can't figure out how to straighten this out. I'm not gonna take anymore pain meds and just suffer through until I can get this straight because I can't risk a false positive alcohol test while on the meds he prescribes. I refuse to break my contract with him but can't figure out how to prove I'm NOT lying?