In my story, one of the main characters finds out that a loved one (parent, lover, friend, doesn't matter) died. Worse still: they find out about it when they find the severed head of that person.
Obviously that would mess up that character pretty badly (to put it mildly), and it would take a looooooong time to cope with the harsh reality of a loved one suddenly being gone. However, this same character hears a little kid scream in the other room, one who is presumably about to suffer the same fate. I planned for him to go and save that child right after. He would look after the child for most of the story.
Should I give my character more time to deal with the trauma somehow? The problem is that he's in a hostile environment fighting for his survival and the story takes place over the course of only a month, so there's not much time for him, and he doesn't have anyone to really talk to - obviously he won't talk to the innocent little child about it and will do his best to hide it from the child.