Sometimes Releasing doesn't quite work so if you've done the Sedona course you know there is a technique where you really try to go into the core of the feeling. It's quite similar to the Feeling Exercise.
When you've released fully you will notice pure energy (remember you can release on the good emotions too). So the Feeling goes right to the sources after releasing. There never is really nothing there as long as you are aware of your physical self in one way or another.
Alex