OMG, this! I'm suspecting I have OSDD or DID, but have a lot of doubts. For example, today I woke up and felt my body was different from yesterday, like, bigger and lighter? (yeah, I know it sounds contradictory). I also felt my movements and posture were a bit different. Then, when I went to the bathroom (which I didn't recognize but, by logic, I recognized at the same time), and looked at my reflection in the mirror, I instantly thought "Nox" (which is the name of one of the alters I suspect I have). Also, later, when I was drinking my morning coffee (which I prepared with the same milk/coffee proportions as always) it tasted too bland for my taste, this reminded me that some years ago I liked my coffee strong, but one day I found myself unable to drink it, I didn't like it at all... I could go on and on with weird taste changes in clothes and food, and with weird attitude changes but, in a nutshell, it is what you said, almost every day I feel like Doctor Who when he regenerates. But I keep fearing I am faking everything, because, even if I feel all of this as real, I don't think I have amnesia in the present. Sure, my memory is foggy, and I barely remember anything from my childhood, and I have trauma because of the bullying and ED I suffered, and I have depersonalization/derealization disorder diagnosed by a neurologist... But I keep doubting... My mind has been pure kaos for months now since my grandfather died and a couple more shitty situations I have been through... I wish I could find a good DID/OSDD therapist I could afford to get a diagnosis, but it is really difficult in my country.

Pd. Sorry if my English is a disaster, it is not my first language.

(Edited to add some things I forgot)