Two thoughts came to mind ...

1. Just as drinking alcohol to excess isn't "the problem" with alcoholics
(it's a symptom of an underlying issue), I wonder if you're basically just
lacking confidence in yourself - and the situations that require you to push
yourself harder (or give you time to realise you've got to think something
through rather than just rely on learned reactions) are what bring those
self doubts to the fore-ground in the form of anxiety? Thought of talking it
through with a professional? Personally, I don't think that aviation is "the
problem" in your case.

2. I think sometimes we do things like aviation for so many years - we've
been caught up in it for so long - we never really stop long enough to sit
back and ask ourselves "Do I really still enjoy this"? or "Why do I still do
this" - I've been feeling a bit that way recently. After a while when you've
seen the same old airports in the same old areas for so long it just doesn't
seem as exciting as it once did.

Good luck working through this - let us know how you get on.

Cheers,

CC