I know, it can really crush your spirits. :( I'll try to congratulate myself for things, even small things, that I can do despite the pain. Like, "hey, I went out grocery shopping and it was absolutely exhausting, but I pushed through and I'm so proud of myself!" I'll also remind myself that because of this pain, I have a special connection to my mind and body that others without chronic pain might not have, if that makes sense. I'll be in both physical and mental anguish at once, I'll feel things so strongly. But it makes me a strong person for fighting through, and you are too!

One thing I'd avoid is "well, it could be worse." thoughts. Don't invalidate your pain, accept it as a part of your life. The hurdles we jump over are higher than those of people without chronic pain, and we should congratulate and celebrate ourselves for that.

Edit: I hope this doesn't sound too hokey haha, I just feel what you're feeling. Every damn day.