nobrainer

I am a 17 yr old male 140 lbs. 5 ft 7 in. My metabolism is fairly fast I suppose because putting on weight has never been a concern. I don't work out much. I stopped smoking july 2. I smoked about 3-4 times a week... but not very heavy... ie, about an 1/8 in a month. I have a urine test for sports on august 2. I'm concerned I wont be clean enough to use my own urine. Does anyone have an opinion on this?
I practiced the substitution method and when i tempted it it was about 94.5 degrees... is this too cold? (BTW, for anyone that doesnt want a thermometer that beeps, try a digital food thermometer, I suppose a non-digi would work too)

If I have to, I'll figure out a way to sub, but I don't want to. So if anyone can suggest which path (sub, dilute, aspirin) I should take please let me know.

BTW failing for me is very very serious.. so it's not an option... and I have looked through a lot of the forum for insight...