Rox 30 and Drug Test

Been taking anywheres from 120mg to 240mg Roxy per day along with lots of Hydros. Get Hydros thru Dr. who gives pee test once a month. How long a wait until able to take test and not have the OC detected? I have looked it up and time varies. It seems like if I waited 3-5 days I,d be in the clear. I,m wondering if anyone has any personal experience with this? Keep in mind, Dr. expects the Hydros to show up. Suppose to take 4 10mg per day.