How long will it take me to get the thc out of my body with my circumstances?

I'm about 5'8" and 230 pounds. I took a few hits from a bong on March 7th. I don't smoke a lot, in fact i'm pretty sure I hadn't smoked in quite a while before then. So the only thc that would be in my body would probably just be from that night. How long do you think it would take for me to get the thc out of my body? I know it depends on how much you smoke/smoked, how often you smoke, and your metabolism, but i'm just worried because i'm overweight so my metabolism isn't great. Do you think that two weeks with my metabolism would be long enough for me to test negative? I have a drug test coming up, i'm not exactly sure when, probably a few days to a week, but will I be good by then? I've only been drinking about a bottle of water (30 ounce water bottle) or 2 a day for the past week (when I realized I would start having to get ready to get tested) and i've been taking two cranberry pills a day, since I was told those help. Do you think with my circumstances I will be able to test negative?