things can overlap including variations of symptoms of dissociative experiences and other mental health issues in general.

while i have dissociative issues for sure, other times it also could be more a PTSD type reaction mixed with dissociation. sometimes, i'll dissociate and feel a lot of fear but also paranoia that heightens to the point it can cause a type of visual hallucination. the fear of someone watching me and wanting to attack me becomes so bad that it causes me to think someone is really there. it's not psychosis on its own and is a manifestation of trauma and dissociation in my case. it took years for me to figure that out but has gone back to childhood. it is based in reality due to past trauma even if it's not relevant in the here and now.

i have experiences where i can dissociate to the degree i barely know where i am. it can be derealization and depersonalization that is very severe, one or the other, or it can be more the DID. in my case, i haven't really thought of it as psychosis because (not always) i can feel another part/alter. i don't outright switch to them, so it's more an in between state, not a total black out but not 100% aware of reality either.

so, there can be a lot of different things that it can be in your case...it's just trying to figure out what is what and how to effectively get through it.

as for bigger countries having better mental health systems, that's not necessarily true. i think a lot, at least in canada probably, would diagnose schizophrenia before DID as not a lot of professionals believe in DID to begin with.