It's tricky, and I think it can be valid, but I'm self-dx or suspecting that I have certain conditions myself so I might be biased. However... Researching this kind of stuff without some professional help or guidance is super tricky, since so many symptoms (especially for trauma related disorders) will be found in similar disorders.

I've been suspecting myself of having different conditions for a few years, and still don't know if I got OSDD right or if a CPTSD diagnosis would make much more sense. Both of them give similar experiences, but OSDD causes more dissociative symptoms as a defensive measure.

I think most of us will agree that the amount of research that you've done, and if you've taken in account how your mental health has been fairing for the past decade, it'll make your claim more valid in the end.