How long did it take you to test clean after quitting?

For context I was a pretty heavy cart user, on and off for maybe 2-3 years. (Daily vaper, a cart a week?) I've quit several times before and for many reasons, but am permanently staying off so I can continue to get my ADHD meds prescribed. Currently, I've been 1 month and 25 days clean. (yay!) I tested on 4/1 (urine) and at my psychiatrist appointment today my doc said there were my meds and cannabinoids detected. I'm to get tested again early June but I'm starting to get worried I won't even test clean then. I have no intention to use at all but I'm getting worried he won't believe that I really did quit if I still test positive then. Anyone have experience with this?