Surprise Testing Help Help Help!!

i was recently offered a promotion at my job and was to that I had to pass a drug test. The only thing is, I am not sure when they will send me to take the test. It could be between 2/15 - 2/17. I thought they might try to test me today so I planned on subbing w/ a friends clean sample. i got enough for a couple of tests but I am worried the sample might go bad before the test. I kep the sample @ about 94 deg. with body heat. my question is, can I still use the same sample if I refrigerate it tonight? I am a heavy user 1-2 times/day. I tried ready clean and something called triple x but tested positive with only 48hrs to prepare. The last time I smoked was 2/10. I have continued to drink 1-2 gallons of water per day but I dont think its been long enough to try the test with my own sample. Need help please!!! Any suggestions?????

Why wouldn't a urine sample be good indefinitely without refrigeration? They're sent to labs through the mail all the time.

Here are some things to think about. Since the less we consume of something, the quicker it passes through our body, maybe you can try to cut your intake. Also, marijuana home tests will let you know in advance if you will pass with your own urine that day. (www.professortestkit.com is one of many sites where you can buy some.)

But, bottom line for me would be: I'd rather fail a drug test than get caught cheating.