You must be taking benzodiazepines for sleeping or anxiety that is why your urine is positive so it's not an issue.
Change your sleeping pills to a non Benzodiazepine if you need to be clean from benzodiazepines for some reason.
Also, long term use of Benzodiazepines is associated with side effects, so do go to your psychiatrist and discuss it.
Next Steps
see a psychiatrist and get a proper evaluation done , if or not a change of medicines is needed.