i just found out my next drug test wont be for at least 3 days because the substance abuse place is closed for the weekend and wont be opening until tuesday do you think i will be safe to trip off about 700mg of dxm 2night and have no false positives by my next drug test? also how much dxm does it take to make a false positive because i had a pretty bad cold if i failed do you think i could just tell my PO that i took some cough medicine? he knew i was sick do you think this would work?