I think I have experienced similar states of mind before. It is overwhelming and makes it really hard to find a way out. I'm just going to tell you what helps me to get out of the 'pit', as I call it (=it's dark and whereever I turn there are problems to the point that breathing becomes hard)

It is important to realise, that this is only a state you are in for now. This is not the definition of you. This your stress system being overloaded without a release and without back-up ressources. This means two things a) you are not in the state to solve the problems right now, b) you can get into that state again once you're becoming your 'old self' again.

The crux is, that this cannot be solved linearly (solving a leads to solving b etc), it feels more of a "I need to solve A before B, but I have A because of B" type of thing, right?

Like others said: Practice selfcare, do small things for yourself, treat yourself as if you were a close friend of yours. You wouldn't tell a loved one that they are a failiure, you'd want them to feel better. For me, writing a journal helps.

(I need to go offline now, feel free to dm me, if you want to. You got this!)