Well... I can't say as I have anything really similar to your situation.

I'm an older person in the U.S. & so I now collect Social Security. They can't take that away... (at least Trump hasn't figured out a way of doing so yet.)

But being judged as "not sick enough" is something I've always struggled with. Somehow everyone in my life (both professionals & non) always seem to presume I'm basically okay... despite the fact I've made two major attempts to end my life. It doesn't seem to matter.
I suppose it's partly my own fault. Whenever I would meet with my pdoc or a therapist in the past, when they would ask me how I'm doing, I would always just reflexively smile & say I'm okay. Somehow I just couldn't bring myself to say how I really felt. And the couple of times I did, all it seemed to produce was disbelief or derision.

Perhaps there's a fine line there between holding back & being honest that I was just never able to walk.

Anyway... best wishes with your appointment. I wish you great success.