I feel pain in dreams, to the extreme. I had a dream (Non-LD) where I was shot by a shotgun, Let me tell you that it was the worst pain iv'e ever felt, and I was asleep!
What seems to work for me is to imagine pain feeling like something else, like adreniline or something, I dunno be creative.
Everyone seems to lack confidence in LD's, I know I started out being unsure wether I could do things like fly or not. But eventually you begin to relise that everything is under your control and you can do what you wish and nothing like lack of confidence can hold you back.
Hope this helps