I so understand and that's the primary (outside of the trust issue) difficulty in healing with therapy, I think.
My t often said it took so long and was so extremely frustrating because I had zero continuity with sessions and therapy.
So it was hit and miss, then out of the blue going back to hit, jumping around to miss and everything in between. Because of it, it was hit and miss like 100+ times.
It's very difficult, and though I've seen alot of healing, that was just one thing that had to be worked through and not healed itself. In other words, I just had to keep going around in those circles with that same lack of continuity because there was no way around it that we saw.
The good news though, is that even when it just felt like continual circles, things WERE sticking and the circles were getting smaller each time I started the pattern. It wasn't really noticeable at the time, but in hindsight it's very apparent.
Just know that even though it might not seem like progress isn't being made due to the constant mood changes, switches, etc., it can be...especially if a journal is kept. It helps every part to have at least a minute amount of awareness that can slow down the cycles by things "sticking".
I doubt I made any sense because it's so hard to put into words, but I hope I made a bit.
KD