I have a physical tomorrow and every time i have one they get a blood sample and i have to pee in a cup. will marijuana show up in the test results?

Won't be tested: You can't be tested for illegal drugs without your consent. This isn't the place to debate the wisdom of our cannabis laws, but until they change, perhaps you can go through life without taking medicines that make people even goofier than we are already. I also hope you do not experiment with illegal substances -- the warnings you've heard about them are actually true. Best wishes.