I Have A Sore Throat. It Comes And Goes .

I have a sore throat. It comes and goes . I am also tired a lot. I signed up to do the Polar Plunge this Saturday. Should I still participate of just turn in my donations ? This is my third year to participate I do not swim all the way out. I only go up to my knees. I volunteer in a pre k class in an elementary school so the bug is going around . I have had this bug since yesterday and want to go back for a few hours tomorrow.