That is a lot to take in. DID always interested in me, I think I have read all the nonfiction stories and books about it. I know I don't have DID, but I don't know why not me and someone else. It is hard to find a good trauma specialist, I imagine it is really hard to find a therapist experienced with DID. I worked with my formal therapist before I moved just recently for over 6 years. In all that time, she told me she has had only one case of DID in her practice.
Years ago I made friends with someone at the gym and she told me she has DID and she is a therapist! So there is much you can do in your life, even with this particular DX. Things can get better and you can heal, but I am sure you know how much hard work it is. Right now, just learning about it and knowing you are not alone and trying to accept it but be SO hard. There is a message board here for this on PC for DID people to come together for support.
The thing about the legs, the more you work with your traumas, you may start to notice more body sensations. They are usually very important to your story.
I hope you have a very experienced T, and especially ones that knows to ground you before leave their office when doing this kind of work.

I've had many more years to accept this of myself and years of work in therapy, we all start somewhere. I am glad you trust enough in your T to open up to her/him. I wish you the best! There are many here on PC that can help in your journey.