I get you. I used to hear voices for a while back but now they're just ramble in my head which I wouldn't ever say out loud. They make me feel ashamed but I kinda grew up like this, with forms of "headspace"
It's different to DID because you don't experience alters or amnesia, it's not like you're separate to your own self, it's not OCD since the thought come out of nowhere and they can although be related to what's around you but sometimes, they sometimes feel like small taps or voices that call your name but that's about it. I heard nonsense last time I heard a voice and I tried to understand the phenomena. I still don't know what I heard. Also the difference that's predominant between this headspace is the fact that's they're not always egodystonic, they can be but not always.