I know that feeling or one very like it.
So many times in my life - I've made it - on crumbs and the fact that I learned the hard way to always have a *lot* of different things to hang onto.
I know its hard but you need new anchors NOW.
Music is a great one for me - I have a whole list of songs I play when I need a boost. Sing, dance, play an instrument if you have ond- or just listen but let the music help you feel better.
Go for a walk and find one thing - just one thing that at least makes you smile.
Collect a tiny victory - it does not matter how small or what that victory is. It can be in your house, at school/work, in a game, a hobby, anything but it must feel like a tiny accomplishment. If you are really struggling it cam be a three tiny accomplishments to get out of bed, feed yourself, and take a shower.
Can you manage to pay the bills (kinda suck to do but feel good to have done), take a walk.
Maybe you did well in a video game its okay to count that as a victory - especially when we are struggling to find one or need an extra one to shore us up.
Take pleasure in each small thing you get done - celebrate it.
How about that craft, building, or furniture assembly project that you haven't done - today is the day to start - a bigger victory and something to focus on.
Or maybe today is house cleaning day as you collect small victories and scrub the pain and stress away.
Write a story, read one.
Turn on the TV and please anything but reality TV or news. Laugh, dream, learn something, or vosit pleasant nostalgia land.
Do something for someone else.
Do you like to cook or paint or draw or something?
Go sit in a park
Pet an animal
Play a game
Read a book
Write a story
Research a random topic of interest because why not become a mini-expert on Aardarks, Animatronics, or Anvils - I've used that one WAY to many times - side-effects may include people commenting on all the weird random stuff you know and increased value in trivia games ;).
I know how the cascade of stuff going wrong can feel. And the fear that when things are right it's just waiting for them to go wrong - a thousand anchors- a thousand things to hold onto. Be ready with that favorite movie, song, book- whatever you can use for comfort use *anything* then find or make new stuff even if it's just tiny crumbs collect them in a bag and use them as seeds then hang on till they grow and keep looking for new seeds and new short term anchors while those seeds grow - you WILL get through this.