Hi litesong,
Namaste :)
A few thoughts came to mind when I read your post. 1. If you worked on all three, you may have chanelled far more energy than you are used to coping with normally. 2. Did you ground and protect yourself before beginning the treatment? (if you didn't then it's possible that you may have 'taken on' the conditions that you were treating 3. You say that you felt exhausted at the end of the treatment...are you sure that you did not allow your personal energy to get mixed in with the Reiki? (Chanelling Reiki should not leave us feeling tired).
Gentle Blessings
Helen