How can I deal with this emotionally?

I am 24 right now. When I was between 22 and 23 I was in a difficult situation and acted in a way which in hindsight does not seem like the real me. I would never think of doing what I did right now and I disgust myself for what I did. I committed a huge mistake by what I did.

How can I come to terms with that/myself?

That I acted in a way, which is completely out of touch with the way I thought and acted before this situation and after this situation. Like a different person…I would describe it as a difficult period in my life, which lasted about from when I was between 20 and 23 years old. But between 22 and 23 it was particularly bad and my behaviour in this period of my life is very difficult to come to terms with right now…