I Am In A Suboxone Program An I Have Not

I am in a suboxone program an I have not touched a narcotic in over 3 years. I take clonazepam for anxiety and robaxin for my neck and back and I also took which I never take over the counter mood for my period. The test came out positive for opiates. Can this test be faulty bc my dr said it doesn't lie but I have been reading other similar proplems and they said there could be a chemical reaction they are not 100%?