Help, ASAP! Urine Test in less than a week

Hi. I am writing because I will be having a urine test within the next week. I smoked a good amount of weed (probably 5 times a week) until about March 20th when I quit until I smoked about 4 times from 4/15-4/20. I then smoked about 4 times the weekend of May 14th and 15th, and again last Wednesday and Thursday (18th and 19th) On Friday (5/20) I took 12 detox pills (4 in the morning, 4 at lunch, and 4 in the evening). My friend said they got him clean after smoking a lot for a urine test while on probation. After taking those pills I smoked again yesterday (Tuesday 5/24) and today (Wednesday 5/25) thinking I was not going to get tested. I am going to be getting a urine test most likely next Tuesday or sometime the middle of next week, or possibly this Saturday but not likely. I have a "ready clean" drink that I bought at a local stoner shop and was told the instructions to use it. Anyone know my chances of passing? I weigh about 155-160, I am pretty skinny but not very active and I am 17 years old. How about any advice for taking the test? I really do not think I can use substitution because I tried that before and did not heat the sample enough and now I will most likely be watched. PLEASe hELP ASAP!