While this might not be the right thing to say, I feel compelled to say it nevertheless: nothing can hurt you unless you give it power to do so.
When I was in the heat of it and naturally did not want to work, I eventually reached a place of working zen -- I will try to do what I can, and forget about my imagined needs of this or that. I simply stared at the screen if I didn't know the buttons to press. This is the experience that I am proud of and that makes me say "I'm happy I went through that."
Too often, we mistake our own fears for limitations, and limitations we do have, we treat as if they were unmalleable. While I always want people to look out for their mental health, I also want people to know what it means to give it their all because I know that teaches you how to break through your self-imposed limitations and grow into an even stronger wo/man.
My advice is to always keep one day for yourself. For me, it's Sunday. Sunday, if I want to work, I work (and when it's that way, work doesn't always feel like work). If I don't want to work, no one can say anything. This gives you time to not think at all about work, which should give you time to stay in system 1 and heal.
What's a real killer is all that unnecessary anxiety and general negative emotions coming from _thinking_ about your work that is hurting you. When you're away from work, stop thinking about work. It's not prudent or responsible of you to be stressing out about something that isn't even going on right now. When it's time to rest, you rest. When it's time to work, you work. It seems simple, but it's the blurred gray area in between the two that affects people the most. When I worked very hard and hit my "work zen mode", it was here that I began to let go of things like what does my boss think or what does my coworker think or some other-nonsense-BS-anxious-thing that has nothing to do with actual work.
I hope it helps. I'm really no huge expert myself, but I am usually the hardest person in the room.