@Nicola M - I'm not T1, so have never experienced a clinically concerning hypo, so can't comment on any of that for you. What I can comment upon is the loss of time, whilst you were so unwell.
Many moons ago, I was extremely unwell, then had a medical crisis which disturbed my electrolytes to a dangerous degree and sent me off into the spaces between conscious and unconscious for a number of days. The conscious times were blighted by vile and scary halucinations (due to the sever electrolyte imbalance), and all-in-all a bit of a nightmare.
Like you, I had a million questions about how, why and what went on during all that time I didn't and don't remember. Over time, some snippets came back or came out from my parents and staff, but not all of it, by quite a long way. Like you, I found this very disturbing indeed.
All I will say to you is, don't press too hard to try to work it all out. You probably never will. All that searching in your memory banks is exhausting at a time when your body needs to concentrate on healing, not on unpicking a nightmare.
I firmly believe that some of these coma or coma-like episodes where our brains and bodies lock down and lock us out is our brain and body's way of protecting us, and allows tem to utilise available resources to keep us alive and as well as possible, given what's causing it all.
Over time, I have accepted that I'll never know fully what went on in that time. I know right now, all that's very well, but, honestly, I do wish someone had told me not to try to unpick it. The exhaustion of recovery was hard enough to cope with.
Take it steady, Nicola, and I hope you feel better and can start getting your strength and confidence back.