I haven't tried healing a DC before, but I can relate to the part about feeling sick, disgusted and guilty after hurting a DC. In my last lucid I decided to get some payback on a DC who had been an asshole to me in the dream before I became lucid. "Some payback" is an understatement - I actually stabbed him through the heart

. As he gurgled and writhed over onto the desk in front of him, I suddenly felt intensely disgusted with myself. Literally sick to my stomach. It didn't occur to me to try to heal him, though - instead I just walked away and tried to shrug it off, telling myself it was only a dream

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