I have used in 12 days but before that i i mostly smoked once or twice a week.Will i pass i been drinking mostly water and beer.
Water just dilutes your urine so the THC is too low a concentration to be detected. It doesnt really get THC out of your fat cells to any appreciable extent.
Get a home drug test kit at a drugstore.
If you're skinny and exercise regularly, you'll probably pass.