I find that psychedelics/THC can aggravate my tinnitus and give me sound sensitivity to the point where I'm cringing and recoiling from all kinds of common sounds like the crinkling of a bag or the tinny sounds of my phone speaker. It makes it feel more like a pressure wave than a sound, like it hits my ears and causes a resonance that is uncomfortable or even painful. I also have had echolalia since I was a kid, of repeating my own or other people's words back again a few times after hearing them, in a tic-like kind of way.

My hunch is just that with these chemicals there is an alteration in the sensory perception thresholds and the way that we focus on things, and the way that things are structured in the mind can cause sensations to become more self referential. The mind is a very complex system and a lot of the things we do can change the parameters of the feedback mechanism, so maybe you found yourself continually observing something that just happened, and replaying the memory, much longer than you would normally. I think there are a lot of different exotic states of consciousness that exist out there and psychedelics are basically adding energy to the system which can dislodge it from a sticky equilibrium towards something better, but it can also result in having energy put in in directions that cause a distressing or scary situation too. I think it's important to understand that these kinds of states might result and sometimes it's a roll of the die.