what about thinking that other parents may feel similar to you? and what's the worst that can happen? are they going to make fun of you? no are they going to announce something about you in public? no are they going to ban you from coming to the field? no are they going to kick your son off the team? no

they won't do anything - probably just wonder what they are going to make for dinner or what they have to pick up from the grocers

they are not inside your head so do not view you the way you view yourself, they have their own issues too, everyone does

just go with the goal of having a conversation with at least ONE parent