Im going to MEPS this week and I dont know if I should be worried about taking my drug test?

I Never have been a big smoker, maybe 10 times in 3 years! I smoked a pipe with a few other guys at a hockey tournament April 15th. That was 73 days ago, and im not to sure how intense the MEPS drug test is? Im an Active kid. 6'4 and 215. Im joining the Army this week and to be honest this whole drug test thing has been eating at me all week.