Welcome to JWD again! It is all overwhelming when you go back and face all those feelings of anger, fear, etc. But when you begin to do that you allow yourself to begin the healing process. All that "stuff" has to go somewhere, and usually it results in some health problems, or suppression by food or alcohol or something more. Its so much better to let that steam off, work through those feelings, and become whole. We're all in various stages of that ourselves.
The biggest thing you will find here is support. Talking to people who feel your pain because they have felt it themselves is a big help in and of itself.
For me, when something is overwhelming its usually because I'm trying to bite off too much. Just take one day at a time, let go one thing at a time, and you will make it through.