Frosmoka

Hey i am in a counselling program where I have been taking random drug tests and using my own piss and they have been coming up clean because right now I am clean. Once i tried to pee just a lil in the cup and then fill the rest up with water and it came back as being diluted - the level of some chemical was 7 when my normal was like above 100. Is this creatinine? the cutoff she said is 30. What can I do to put extra creatinine in me? Also, since they have my prior urine tests on file if I started to use urine from one of my clean buddies who is male, would they be able to tell a difference between his and mine? Thanks for any help