The "headaches" are one of the signs. I get mental ones, I would tell people, My head hurts. That means I'm switching. Most DID people have 'headaches'. I know some of what goes on, then other times, I don't. I just know I'm not me. I go to my husband sometimes (more lately 'cos going thru a bad time) & say to him "I'm not me".
Denial, oh yes, been there. This is meant to be funny so take it lightly- Anytime I say to myself, Hey, I'm not DID, I'm not like Sybil (I hate when people compare people to Sybil yet I do it to myself to get my own goat). I don't lose "that" much time. I just have a wild imagination. I'm creative. I like to talk to myself. (& answer) But no, I'm not DID.
Then I would get a mental kick. A "So, you think we aren't here huh?" Then I would start arguing w/ them & they would say, Um you are answering your own question. We are here, we exist, we are real.
My mind's kinda going oddly lately, so is my grammar. But I understand. I do. Even if my words are coming out in gibberish.
Love,
RM