help!!! one last question!!! urgent!!! test tomorrow!!!

hi...little background...im 6'4" 190, dont exercise much but believe i have a failry high metabolism. Smoke 4-5 days a week for the past 7 or so months, a few bowls a day usually during those 4-5 days. Anyways, found out a week ago that a job i previously had wanted me back. I accepted and then found out my drug test was two days later. The thing is, I have taken the test before (though never at this short of notice) and knew it the cutoff was 100 ng/ml instead of the usual 50 ng/ml. The night before I took 1/2 gallon of water with certo, as well as the morning before the test (about 2 hours before) and 4 asprin. I passed it, though the problem is, i found out i have another one tomorrow (a week now without smoking), this time for the Department of Transportation (coast guard specifically) seperate from the original one i took with the employer, and this one has a cutoff of 50 ng/ml. I have no idea what i tested at earlier, only that i passed, and i am really worried about the test. I plan on doing my certo water and asprin again, but any insight or guesses as to the outcome tomorrow would be really really helpful. Thank you so much ahead of time!