i have not had this issue with the diagnosis of DID but with another one. but it didn't really change my overall treatment since they were similar, though the DID became the more predominate thing i struggled with too.

i don't question my DID diagnosis because i have not had reason to due to the fact i recall knowing some of the other parts in childhood and as the years went on as i got older began to meet them. i also had it confirmed by my therapist after being the one to bring it up. it was after i did that she was able to more officially even diagnose me since she had seen me on and off over a few years and wasn't 100% sure.

so i guess it really depends on your experience personally and if you could be in denial or just don't recall things or maybe things for you are just quiet so isn't much of an issue. that can happen too. i had many years where things were so quiet and stable for me that it was like i had never struggled, but then things stirred again which had me realize again that the others do exist and are real even when i still try to deny they are..