What do you suggest if i have a urine test tomorrow i used cocaine yesterday what should i do?

Prepare to fail test: and suffer the consequences of your actions. Which is ultimately what life is about, except for those who have given themselves over to the delusions of being drug abusers. Worry more about dealing with your cocaine problem than getting caught and you may perhaps have some benefit from your current circumstances. Trying to 'beat' the test is almost always unsuccessful and gives you more trouble.