Like an idiot after a night of drinking I was convinced to try coke for my first time. I took two bumps about 20 days ago. I probably won't have a hair follicle test for another 2-3 weeks will I pass?

Probibly won't for another 2-3 weeks? Who gives an advance warning of a random test that far in advance?

A one or two time use will never show up on a hair test.