I read a book the other day. Fussel's Wartime. He talked at length about interviews with combat veterans who said that they were welcomed into the fraternity of men who have faced death when their buddies noticed that they had soiled themselves. No joking, no pointing and laughing, nothing funny about it. All of the more seasoned men saw it and said things like "been there," or "yeah, that happens," or somesuch. For the men who didn't have such immediate and visible symptoms, there was always the aftermath. The sight of men vomiting uncontrollably, laying curled up on the ground sobbing, or running off for a quick change of uniform minutes, hours, or days after a fight, particularly their first, is very common.
It happens, and it certainly doesn't make you a sniveling little girl.