Thank you everyone.
Do you have a routine to check in with yourself? A self assessment? I would do that.
I am not entirely sure what this would look like. I do check in, in the sense that I do take time to listen to what my parts are trying to communicate to me and what it is I am feeling through-out the day or recognizing what emotions are present (and why) and such, if that is the type of thing you mean?
I do have experience handling emergencies without dissociating, and handling them really well as I think you did here, but often later I am numb and detached. Numb and detached is better than being a dysfunctional wreck, but it is not entirely healthy. It makes me temporarily less available to my family, among other things.
I have handled many emergencies in the past but not as many after the DID has been more of a focus so this is the first time I have been conscious of dissociation in such a setting or afterwards. Until processing with my therapist numb and detached were the most prevalent emotions I had with small bouts of tearfulness. I also experienced being physically unavailable as it triggered some emotions from the incident.
I would consider what you did as progress- so what now? Cheers!!

Thank you. I feel so too

Thank you for your support.
Johnny-Jack: I think you make some good points, many of which I'm already quite aware of as this has been part of my job in this system since quite a young age. Handling emergencies has tended to always fall on me as I am able to stay calm, collected and be a reassuring presence to those around me. Even more so to DID'ers as I understand a bit more the challenges and how to most appropriately help. Specifically helping people that are in my care, I find I am even more present as of course there are the added emotional connection and a responsibility I have chosen to taken on for whichever reason. I really can identify with what you wrote.
I had my session today with my therapist. We spent almost two hours talking and I'm feeling a lot better now. We went through the whole thing chronologically as that was important to me to sort of say out loud everything that happened and process it that way and in part so that she could help me determine what I could do differently or if my emotions about it were true - e.g "I should have done more" and so forth). After this we touched on a few points of things it triggered in us as well as allowing for a place to release some of the emotions of it all which meant I was able to properly cry and feel safe to not guard myself physically which I've been having problems with (however minor) after this happened. I am not as scared now that someone can come up behind me or that someone will pull a weapon on me and so forth and considering it's been 2 days I don't think I can expect it to move along much faster than this, realistically.
My therapist commented on my crying and how she sometimes doesn't see beyond our strength and perseverance to see the pain and hurt we still live with. She, as everyone else, sees someone who is (according to my papers) "high functioning" and a relatively stable person. In therapy the switches are definitely more noticeable but we've come a long way with cooperation and we tend to work together there as well. I think it was good for her to see me crawl up in the chair and just cry and see that more vulnerable side of myself in all of this. In a way this is progress as well as she was able to see this, contain my emotion and talk me through it all and I was able to listen to her and work with her to find some solutions to some of my thoughts and emotional needs.
Thank you everyone for your help and kindness.