What you describe is pretty common from what I've seen with DID. Everyone is a bit different so there is no "textbook case" to compare to.
I wouldn't consider it a change, but perhaps part of your inner self now recognizes that things are better than before or that you are strong enough to handle it and are now revealing themselves to you.
The denial can be pretty persistent. My wife was sitting there thinking about what to write to someone in a PM last night, then looks up and me and says, "Did that just happen?" 3 responses showed up from 3 different alters in her system replying to the PM. We've known for almost a year now and there are still moments frequent moments of denial like that.
You might try some herbal teas to calm down a little bit. Sunflower was significantly helped by an "as needed" anxiety med. I don't think she has taken more than 3-4, but just the thought that they are available is calming. Could be something to discuss with a Dr.
How is your husband handling it? It was pretty unsettling for me at first. The open forum is focused on direct support of people with DID. However, I'd be happy to talk with him through PM's if he has questions. One SO to another.