My wife recently lost her Grandmother and she can't handle it. It has caused her to become very angry. To help I look up things and find nothing useful. So I yell at her out of frustration and accuse her of abusing me because she raised her voice. All this does is cause her to cut herself several times and punch her leg repeatedly. What else can I do. She should be nice to me no matter how she's feeling.
I couldn't tell from your post or title,...who has autism? You, her, or the both of you?
1. In certain situations, there is no "fixing" to be done. Your job is to listen, empathize, and give emotional support. Validate her feelings.
2. She is likely raising her voice because,...in her mind,...you aren't satisfying #1, and she is frustrated and angry that you, one of the most important people in her life,...is yelling at her out of frustration.
3. The fact that she is harming herself,...that's a red flag,...that's a serious thing.
4.
"...accuse her of abusing me because she raised her voice." "She should be nice to me no matter how she's feeling." OK,...you do realize these quotes read like they came from a child,...right? It's literally NOT ABOUT YOU. I hate to do this to you, but step up and take it on the chin right now,...as a husband,...that's part of your job, to be on the receiving end of emotions. As a husband, you need to be her "rock", someone she can go to for support and understanding.