Oh, Wormy -- honey! I'm sorry that happened.
Terribly embarrassing at the time, and even now. Over time, though, I promise that it will be less and less a difficult memory for both of you. As your cohort ages, the guys DO grow up and mature (most of them, anyway ), and as they get girlfriends, lovers and wives, and become parents themselves, they become much more knowledgeable and comfortable with women's cycles -- and generally comfortable enough to be supportive, etc. And as for we women, well, it becomes much more a matter-of-fact issue. Still a personal one, but not nearly as excrutiatingly so as in the teens.
Hang in there!
DD