My Doctor Has Prescribed Pains Mess For Years I Currently

My doctor has prescribed pains mess for years I currently get oxy.codone 10s and was informed that she was weaning me off because she found hydrocone in my urine but I had these pills that where prescribed to me in 2015 by the same clinic I just happened to still have a few so I took them because of sever pain is this fair for her to cut me off