I was arrested for trafficking hydrocodone (16 pills) that my sister gave to me. Neither of us knew it was illegal for me to have them. I have been prescribed hydrocodone several times for my back although at the time I could not afford to refill my own prescription so my sister gave me what was left of hers (she has the same back problems). At the time of the arrest I was going to an appointment for an MRI and to get a new hydrocodone prescription. Does the affirmative defense apply to my case since I have medical proof of my condition and that I currently am prescribed to hydrocodone?