I would have said they aren't going to check for that but since you are saying it is checked on the form, maybe. You may have had dirty urine before this and that is why they checked it. Honestly, I know it is hard but I'd talk to your doctor about your pot smoking. If it really is just for nausea, maybe they have an alternative or maybe they will say okay. But at least everyone will be o the same page. That's really my best advice. good luck and let us know how it goes!