How long does cocaine stay in your system? Tried it once recently at a party have a life insurance physical coming up.

2-3 days. Depending on how sensitive a test they are using, how long between your use and the test, and how much you used, it would be unusual for it be found more than 3 days afterwards, and virtually never more than 5 days later. Again, usually 2-3 days. There is a metabolite of cocaine, cocaethylene, which can last longer and occurs when people drink while using cocaine, but wouldn't be more than 5 day.
Cocaine. Cocaine can be detected in the blood 5-6 hours after use and in the urine 12 hours after use. If tested for, a metabolite (break-down product) of Cocaine called benzoylecgonine can still be detected for 2-4 days in the urine (up to 10 days in heavy users).