I hear you on that one. As a teenager who literally walked everywhere, and to be honest not much changed until I was 42, I used to think that not being able to walk would be the worst possible thing. I was wrong. Back pain and neck pain is worse. I guess my view changed the day I had a very quick decision to make, save my leg or save my life. I chose the latter, literally tying off my left leg well above the knee after a dog attack (both of us were attacked and bitten) . I stopped counting at 114 stitches. A major artery and a major nerve were also severed and a major vein damaged (that healed thankfully, but the artery and nerve didn't).
Even though I can now walk again, I still find the back pain and hip pain more debilitating than any of the leg injuries I've had (including 6 months totally non-weight bearing on both legs last year).
I just have to remind myself 2 things. 1, I've been worse and 2, there are plenty others who are in a worse position than I am, even if I live off morphine 24/7 to manage what I do.
Best of luck on those appointments. Psoriac arthritis isn't yet ruled out for me either. Hmph.