I think that many people start wondering about DID if they have gaps in their memory; like not remembering a chunk of time or some important event.

Another is being somewhere and not knowing where you are or why you are there.

And, other people acting like they know you when you have no clue who they are.

I got used to hiding my switching. I did things like turn on my GPS even if I was going somewhere familiar, or making notes of things. If you are curious about if you have DID, you can ask for a psychologist to do testing to figure it out. In my experience, they are slow to say that you actually have DID.