Could Morphine And Amitriptyline Benzonatate Be The Cause For Positive Marijuana Results?

hi i just got word that i tested positive for marijuania AND I DO NOT SMOKE i was given several pain meds and i wanted to know if they can give positive readings tremadol, morphine dimeroral amitriptyline benzonatate and methocarbam none of which i am still taking but have hade in over the past 2months i have pinch nerve in back was in er with food poisioning copd and chroins