It could be you are dreaming this all the time because issues related to why you SI or the SIing itself is what you are working on? I know I dreamed for 10-15 years about my old apartment where I lived alone before I was married and I was always cleaning it (depressing because I'd wake up feeling great because my environs were cleaned and then find they were not :-) and, extremely depressing for I don't know what reason to this day, I would dream there about cock roaches in the apartment (there were when I was living there) and they always made me feel hopeless.

I dreamed this dream throughout therapy and eventually, toward the end of therapy it went away like several of my other symptoms. So, maybe your dream is just a symptom helping you in some way; frustrating, I know, but try to be "grateful" for it, just sigh and shrug?