Another ping a drug test question?

My parents decided to start drug testing my brother & I. He just got out of juvi for ualt & then failed a drug test while he was there & they didnt know he smoked and decided to be fair and start randomly home testing both of us. Prior to being informed of this I smoked alot. I really need to p the test. I am a straight A student working toward eartly graduation this year & I can't afford to fail. I weigh about 125 pounds, I exercise, I eat healthy. Ive been taking azos every day even though I dont know for sure if they work. I'm also doing "Detox 7 Dietary Supplement Internal Body Cleanser" which takes 7 days. I have been drinking at least 8 bottles of water a day. I'm going to go buy some home tests before they test me and see how I'm doing. I was hoping someone could tell me if I could realistically p a drug test after 25 days of not smoking and doing all these things? What other things should I do?