How long does THC stay in your system?

Im about 298 5’3
I don’t really smoke but I decide to try once. I smoked about 39 days ago. Only once. I was hitting the pen a couple of times and haven’t smoked since then. I have to get drug tested today. How long does thc stay in your system. Do you think I’ll pass or not. I’m really nervous.
I also drank about 25 days ago. I was a somewhat heavy drinker. Do you think I’ll pass or fail. I really need to know I think I’ll pass but I’m scared