Took oxycodone for1 week and have to pass urine test in 4 or 5 days need advice on achieving this?

Sorry about that: It should not be the job of any ethical professional to help some avoid detection on a drug test. What you need advice on is personal honesty and taking responsibility for your actions. If you have a drug problem, face it and get help. If you don't, you were being careless and reckless. You either need help with a substance use problem or with developing better character. Good luck.