This is a lovely bit of songwriting, and a high standard of production as I've come to expect from TAFKAP (The artist formerly known as Pablo)
The lyrics are very well thought-out and moving. But I'm not sure the octave swap in the verses is the way to go with this song, despite being a good idea and an interesting way to add interest to the song.
(slight deviation here: Neil Finn does a similar thing in Distant Sun (crowded house) but it only sounds like an octave jump. The top melody is actually different from the bottom one, and they combine to make a single melody.)
I actually think the song would be better if you pitched it halfway between the two extremes and sang is straight. Partly because I think you'd be able to deliver a more delicate and nuanced vocal performance in a more comfortable part of your range, and because that more comfortable vocal range would probably relax your phrasing enough to bring enough variation in the delivery to hold interest.
But it's an arrangement detail. The songwriting is spot on here Kafla and that lyric about dryness in your mouth is perfect. You've got the bulk of a great album written by my reckoning.