You are not alone. I also live in a dream, and I am extremely dissociative. I'm dx'ed with bipolar disorder and CPTSD. And who knows what else. Who cares what their book says; it's all about the individual's interpretation.
Also extremely sensitive, perceptive, I'm a tetrachromat. It's definitely my own world, like being high all the time on a psychedelic (but I'm not). Medication helps keep me stable in a certain way, but therapy is essential.
Generally, the type of perception we have may be genetic in part - but it is almost always triggered, or set off, by extreme and/or chronic childhood abuse, or some type of severely damaging experience. Sometimes a very bad physical illness, especially during childhood.
But please believe me - you are not alone. Maybe we are God's chosen children. Who knows.