I'm not necessarily DX'ing but I wish someone had pointed me at some resources when I was just starting to ask the inkling of the same questions. I'm getting to do the work at a much younger age that I see not many people doing until the end of their lives, though it is sort of hell being young and all.
Pete Walker's book on Complex PTSD is an amazing read regardless for anyone in the community, I'd say without diagnosing that as a potential avenue -- take a read of a few snippets, see if they resonate with you (or trigger massive denial/distraction chains), and just work your way through the book slowly if so. The techniques in there can help anyone with even "just" an internal (or otherwise) critic. :)
Hope this helps, the brain is an interesting place and we've only gotten some really good resources for misc conditions that don't externally seem to fit a particular mold. I'm starting to believe that every trauma reaction variant is some exemplar mode of some superset of possible adaptive coping mechanisms, and that in reality the dx and treatment of these things can be much more on point than the diagnosis of "anxiety" or "depression", which I'm viewing more and more as exceptionally frivolous and misleading as a standalone diagnosis (instead of as a descriptor, or a modifier), and is oftentimes as effective as diagnosing someone with "a fever" or "chills and aches". Doing so would alienate the person (in my eyes) and would take a place in a/the diagnosis "slot" that could hold something more informative to their actual base condition (instead of being a rather shallow observation with practically zero actionable value.... And we wonder why a variety of treatments for depression, for example, have low-30's success ratings across multiple stages of trying different treatments! I can't remember the exact numbers but the 4-5 stage...STAR study, I think it is, was one of the biggest and rather disappointing. The future seems somewhat promising but still too far away.... ::( )
Knowing _why_ is the very extremely hard part. :))))