Slingshot: I have to agree with Gigantikok's statement above; I do some semi-professional stage acting (improv actually) and when you're on stage, the situation re showing a bulge is completely different to that in everyday life.
Everyone is already looking at you, they can look straight at your crotch if they like, and if you're sporting a huge bulge, they will. I wore black tights on stage once, thinking, "ah, it's not so big, everyone has a bit of a bulge, no-one will give a damn" (you know how you get used to the size of your own cock, it stops seeming unusual). When I got on stage: the other actor just lost track of what he was doing, the audience laughed, there were comments from the sidelines... the show basically stopped while people stared at my bulge. It has been years and I STILL get comments about it.
My point is: you are right to worry, people will feel free to embarrass you about it, and it's unprofessional to distract from the show in such a way.