There are a lot of different levels to dissociation. They range anywhere from spacing out and not focusing on what you're doing, to dissociative disorders (DID, or multiple personality disorder being one). Did she explain why she might think so right away? Usually this is something that people are a little more cautious about bringing up with patients, so it interests me as to why she was certain so soon after talking to you.

I was talking to my counselor on Friday, asking her why she first suspected that I had alters, and she explained that I would switch topics while talking to her, my body language would change, posture, voice, facial expressions, etc depending on what was going on.

Things that haave come back to me that 'fit' are comments over my life about how I act "completely different' around certain people, like I'm a totally different person. people had mentioned that sometimes I get so silly/upset/energetic/etc that it's like I'm not really me anymore.

many people notice that they lose time, or can't seem to remember blocks of time, or important events, often consistently. They might 'come to' and realize they are somewhere else than they expected, they may find receipts in their bags for things they dont' remember, new items in their house they don't remember buying, extra mileage put on their car they don't remember driving. People they don't seem to know happen to know a lot about them, or people call them by another name. These are all suggestions of lost time.

For me, I don't lose time, but I do switch depending on who's in charge of my body. I've learned the differences between each part, and their emotions/reactions/body language are all distinct from each other. I don't just randomly switch, there are specific parts that come out consistently. I used to get so confused that sometimes I could do x,y or z really well, and other times I couldn't. it would just come and go. Or i'd like certain things, people or activities at certain times but not others. These were all signs that while I wasn't losing time, I was still switching.

A lot of people describe other levels of dissociation where they look in the mirror and don't recognize themselves, or things they know are familiar don't 'feel' familiar. They will feel distanced from things or people around them, or even from themselves. they may not be able to focus on what's going on around them, or may be able to communicate but it feels like it's coming from a really long way away. It just feels weird, different, or absurd, compared to what they're used to.

These are all different levels of dissociation. I find a lot of people, professionals included, use it to mean different things. Some very specific (ie switching alters) and some more general. If you are concerned the best thing you could do is write out all your concerns, and as many questions as you can think of and bring them back to her next time.

I remember being so confused when my providers brought it up, and they did so in a fairly gentle way, starting with mentioning that I sound different, and leaving it at that, then talking about those differences a little more in depth each time. Even then it was overwhelming. I can imagine it would be scary to not know what it all means for you, and to have someone new telling you all of this. At the same time, for me, when I started looking into the symptoms, I realized that while it was overwhelming, it was the only explanation ever given to me that made sense, and just fit.

Good luck with figuring it all out. Try not to over think things. When they come up, write them down, keep a list somehwere and bring it in to your next session. It could end up being true, it could end up not being true. Only time, and work with your t, will really bring about any answers.
Keep us posted,
IJ