I don't know what's wrong with me. I think I had a nervous breakdown over the past month

I dont even know where to start. I am feeling so alone and scared. I have dealt with mental health issues for a good part of my life. I've been diagnosed with social anxiety for sure. But I've always felt there must be something more than that. I get so depressed and angry. And I just have such difficulty socializing and forming relationships with people. I need a routine. I need my coping mechanisms.

It's caused me to be afraid of people. And to lash out at people. And then I get panic attacks from the shame of lashing out.