From what I know, standard medical exams for immigration often focus more on overall health checks—things like lung function, heart health, etc.—rather than drug tests. But I understand the nerves, especially with how regulations can vary.
Last year, I had to go through a similar process when moving to Canada, and I was also a regular pot smoker. I remember freaking out about the same thing. A friend mentioned
ccwrc.org to me as a resource for understanding what's out there in terms of managing drug tests. It was reassuring to read about different approaches people take, even just for peace of mind. Best advice? Stay calm, go in confident, and remember that these exams are more about general health.