Why again? in Insignificant Me?

I am unable to think about what to do next nowadays. I feel frustrated most of the time and I know doing nothing won’t help me. One step at a time is easy to say but doing it is very difficult for me now.
I am frustrated with myself and it’s not good for me. I made a stupid decision last month and paid the price. There seems to be no way out of the mess, I created. There is no financial burden or responsibility to me right now but I am suffocated.
What should I do? I am so vulnerable and scared to hurt myself without realizing it.