cocaine

So Saturday night I got hammered with some of my buddies at a nightclub, around 4:30 am (sunday) I got offered some cocaine and I took a bump of some really pure cocaine, fast forward (Tuesday night) I have a drug test tomorrow morning Wednesday. I bought a drug test kit cause I thought I would...

Ok so back story. I did Cocaine last week about 2g in the beginning and 4 days later did another 2g. Last lines (2) were last Friday afternoon. I tested myself today. Tuesday and was positive. I thought it only lasted 1-3 days?? Help on experience and how long it actually takes to be clean please.