Drug Test with Clear Flush?

Day one: I took one rip from a bong.(clean up to that point) Day 2: Random interview with a company: 48 hours to take a drug test. Day 2 (cont'd): 1 Gallon water. Day 3: 3/4 Gallon water. Day 4: Clear Flush + 16oz. water -2 hours later then piss test. I did smoke cigerettes, no drinking (im habitual). Did I p?