I can certainly understand how that is. I have had some issues with getting to therapy as well and nearly skipped it this week.

I wanted to add, I think one of the big differences between people and their parts and people with DID, is that most people are fully aware and conscious of all aspects or parts of themselves whereas people with DID are not. They may have parts that are hidden from their conscious, they may have parts that will come out or take control and they are unaware of it.. leaving them with a blank space in their memory.

For example, I may have a conversation with my husband about plans he has after work tomorrow. Tomorrow comes and it is time for him to be off work and I have NO idea where he is or what he is doing because I have NO recollection of our conversation about it. (This has actually happened in the past.) And it's not as if I have a vague memory of it or like it slipped my mind or I forgot but I can kind of remember when reminded, but rather I have absolutely no memory of discussing the matter with him.

Not everyone experiences dissociation or DID in this way.. this is just my experience. I have also had experiences like you described - in my head when I am alone. I don't know where those types of things fall though..

Anyway... just my 2 cents.