Yea, that would be a stressful time for a lot of us! Im sure you didnt put your hands in your mouth at all before washing them. Hope you dont let your anxiety rob you of your special day! Congratulations! Try and do some deepbreathing exercises in the lead up to your graduation, there is heaps on you tube. Dont want you to think your excitement is anxiety is an sv* because sometimes they all seem the same!