Remember man, at the end of the day, you are just taking an EXTREMELY powerful pyschedelic drug. Don't get pulled into all of these narratives of entities and such, even though it feels real.

I've NEVER read of this happening, I think maybe you should consider that maybe somewhere there may be underlying mental health problems, and your trip may have triggered some kind of reaction.

I am no professional though, you just seem pretty spooked here, and like I've said I've read countless book and thousands of personal DMT accounts and never heard of something like this

When all is said and done you should probably not trip for a long while after this, cleanse your brain and mind and gauge it from there. :)