This was... interesting.
It was a very visceral experience, felt almost too personal. I loved the way you played with day and night to both comfort me and make me feel uneasy. I think I would've liked more insight into what I was before, but I guess that's the beauty of it... this is an extremely emotional experience, and saying anything concrete about myself would detract from that.
Music, like others mentioned, is hit and miss. At times it feels almost made for the moment described, this "purgatorial" state of existence you mentioned: at others, it's extremely distracting and pulls me out of the story. You mention you liked experimental stuff, so maybe I would've liked to see some tracks based on nature sounds (water, dirt roads, leaves rustling).
I think the ending was pretty good. If it were me, at that point I would've played a bit more with other senses: have me talk about smells, sounds, visions... indicate that at the end of this journey, I'm feeling more comfortable with what I am, my senses sharpen and I look proudly into the night as I embrace what I am. You did get that across of course, I would've just pushed it a little further because it's a really cool idea.
Great work! A short story that made me go through a lot of things in a short amount of time. So if that was the intent, I'd say you nailed it.
NOTE: I did find a typo near the end, "when the sun come up". don't remember the exact location.