Buddy I can’t answer that. I suppose it depends on the hospital and whether marijuana is legal where you are but I cannot offer you advice, and realistically neither can anyone else. A general consensus is not going to help you keep your job.
If you really need that job, you should probably try not smoking weed.
If it’s OK if you don’t get the job, ask them. They’re gonna find out sooner or later, may as well be sooner so no one’s time is wasted if they mind.