drug testing

So I want to work at braums but scared they drug test. Anyone know if they do for sure drug test? It says that there is a possibility that you may have to submit a substance abuse test, should I mark yes or no? I don't really do drugs but I smoke pot just about everyday.. it helps with my anxiety and ADHD and my cramps and stuff. I also take nonprescription pills every once in a while in lean. I'm so worried if I go to get a job there they will make me take a drug test then I have to explain to my mom why I didn't pass. .-.