Blood and Urine drug test?

Ok I hang out with alot of pot heads one day i actuly smoke for the first time but found out i can get a drug test by the blood and im joining the navy i did a stupid mistake, i have 20 days till it, i herd the thc stays in the system for 12 days, and store in fat for 1-3 weeks with light uses, now my question is will i p? i work out basicly every other day to burn fat and gain muscle, i take ZMA, Lysine, and drink around 2 or 3 protein shakes every day with a breakfast drink that has Vitamins from A,b6,c,d,e,k and have calcium, iron,thiamin, riboflavin, niacin. I also lift weights and do push ups and situps. Will any of that will help minimizing the Thc?