Hello all, this has been difficult and I'm sure there were plenty of signs with it through this game alone, but there's finally some sort of answer.
Despite the past years and the physical issues I faced with seemingly no answers at all, for the past year specifically, there's been a consistent build-up to the point of repeated physical issues; often of different types and barely with a month in between as of lately. My most recent issue was actually experienced for several months undetected, because it didn't seem like a concern when noticing it, but I had signs of potential loss of vision for a while and just barely got looked at. Currently, my condition's stable, but I have a blind spot called scotoma where it's thankfully not too big and not in my center vision, but there's still a gap of information in one eye that my other eye now has to make up for, and it may resolve on its own once the main condition is taken care of.
I hadn't been too open about this out of embarrassment; being told by my primary care doctor that I didn't need to be looked at by any specialists because my condition seemed to be "from psychological and emotional stress" rather than something that's just not where he's looking or outside of his field. Instead of realizing something was wrong, he would make it clear he was tired of seeing me and started to just urge me to only see my psychologist, just without openly saying so. I've not even talked to my friends anymore, as I've socially withdrawn, feeling embarrassed as if I was making a fool out of myself for experiencing all that I have with "normal health". Once my optometrist saw something was wrong and ordered an MRI, it was finally relief, but a bittersweet one. I'm currently being sent all over the place, as there's nothing yet directly pointing to the cause of it.
Edit about a year and a half later: they figured it was a genetic autoimmune condition causing inflammation to my optic nerve and I've been on different corticosteroids. I keep forgetting what I say about myself: if I disclosed anything mental, then please discard it permanently. I've regained my vision that had been worsened, the temporary blind spot is gone and the black curtain isn't invading my vision much anymore. My constant visual disturbances, originally misinterpreted as hallucinations, have stopped being an issue. I've been working on art much more than I had the previous years from worsening without an answer. I hope to make something again in its entirety. I feel bad for seemingly dropping everything I want to produce or entering hiatuses constantly.