can marijuana mess up a pregnancy test
Submit. Â· just now. Report Abuse. No, marijuana doesn't 'mess up' a test. If the control window doesn't show a line first, you may have done it wrong or may have a bad stick. If you accidentally peed on the window, just make sure you get pee to go to the 'results' window to see if it turns. It's all just one big cotton stick with a certain chemical near the results window to react with the hormones in your urine.