therapist diagnosed me with DID, but psychiatrist said to “run”…

i never talk about my mental health online due to inner monologue disagreements (if that makes sense?), but this has really been tripping me up.

i went to rehab for two 1/2 months in september. the therapist i was assigned to had been in the field for 40+ years and was spoken very highly of- she also specialized in trauma. our first session i fully opened up for the first time to anyone and spoke about what goes on in my mind and my confusion surrounding it. a few sessions later, she diagnosed me with DID. i wasn’t quite expecting it so it took some time to digest but a month later i had my first appointment with the psychiatrist so i brought it up.

i told her what my therapist had diagnosed and asked her if it was possible to delve deeper into it, or if more assessments were needed. she proceeded to go off on a 10 minute tangent about how incredibly rare DID is, how it’s impossible to diagnose in a few sessions and takes multiple years to catch, that my therapist is incompetent, so on so forth. she ended with saying “i’d run fast and far if i were you”.

it really sounded like she didn’t believe me or my therapist, and now i’m wildly confused. is any of what she said correct and was my therapist just incompetent and rushing with assumptions? towards the end of my stay, i’d really started to accept the diagnosis and felt it fit, but i also constantly struggle with wondering if i’m schizophrenic, or allowed myself to develop symptoms of DID solely because that’s what i was told i have.

ps: not looking for a diagnosis. just want personal experiences on how diagnosis typically goes, advice on navigating feelings, or support.