Getting marijuana out of your system?

For starters. I AM NOT A POTHEAD. I had not touched the substance in a few years. Well now its the day after doing it. I shared about 2grams with 5people. And now thinking about it today i know it was dumb. How would i go about getting this out of my system? Do the gnc products work at all? I already drink a lot of water. I know this was dumb so please don't leave comments like just don't smoke pot or don't do drugs so someone else can get a job. Did not ask for stupid answers.