false positive for coke ⁉️

Harley
I went to my baby doctor today and I was told I failed my last drug test for cocaine. This caught me by surprise cause i never in my life touched the stuff. I'm very close to my due date and I'm extremely worried.
Update: I found out that the medicine I was taking could cause it (Tylenol: cold max) and my mother in law is friends with an obgyn and she told her on the cups for the urine test sometime have chemicals on them or I could have possibly touched something with it and putting my hands in my mouth.