I have had those feelings...a lot. I eventually was able to thank God that I was no longer that person, and move forward. It may take some time (it did for me) but keep saying it...you are NOT the same person you were when you were using. Then try to forgive yourself for being sick......you are not a bad person, you are a good person with a terrible disease.
it will get better, I promise, the greatest gift we can give ourselves in recovery, is forgiving our own mistakes...only then, can we make amends and move forward.
Cathy