Meditation and hypnotherapy helped me a lot. Instead of focusing on the entire bad things, I was focusing on a small good thing and enlarging it every day which helped.
I hope you will find something that helps you too

What about self help? Have you considered meditation, hypnosis etc ?

I am not just "saying" but I am very much familiar with the path. One day, you will look back and be proud of yourself because no matter what happened, you survived!!
Have you considered counseling?

Please try to find someone to talk to. We all have days like this. If you don't have anyone immediately please ring 116 123 or even the emergency service.
We don't chop our hand if we have a splinter. Dark clouds WILL go. Nothing is permanent.