False positive due to Wellbutrin and abilify?

My Pm doctor did a urine test and just told me that I take methamphetamines! I never have. I take Wellbutrin and abilify which are both listed as causes of false positives. The urinalysis DIDNT list my current medications for them to know. What should I do? My doctor said they're going to taper me off my medicine and I'm furious.