I'm going to guess that your wife is angry over the years you were drinking and all the issues that arose in your marriage. Though you have 21 days sober, it's not enough time for her to forgive and let go. Your not drinking is not the only dysfunction in your marriage. She will need help to constructively face the anger she is feeling. Could you suggest that the two of you go to a counselor and let him/her help the two of you work on issues?
21 days is wonderful. Don't let your wife's anger help to derail you. With good counseling the two of you can have a stronger, healthier marriage. Just don't expect that all your problems are resolved just because you quit drinking. Your wife's anger is one evidence that there is work ahead for the two of you.