i went to the doctor for a routine examination to get my blood pressure, choleresteral and pain meds refilled. i told the doctor that i couldn't afford the test he wanted me to take. he told me to pee in a cup and took some blood. i thought was for diabetes and chlorestal test but when i got the lab bill which i didn't expect because i told him i couldn't afford the test, the invoice i recieved said i tested positive for Oxycodone !!! i haven't had oxycodone since 2005 when the hospital gave it to me after a car crash i was involved in. can i sue the doctor or the lab for defamation as this will cause me difficulty in the future. thank you