Thank you Windyshores for your input,
Yes, it is scary dealing with this, trying to improve strength etc, to improve scores, with a background fear that something could go wrong.
Only yesterday near my local supermarket I avoided a mishap/serious fall, in contact with raised paving brick. They know about it and are waiting for repair, no barrier though in meantime.
So yes, it's a case of fingers crossed, and being as sensible as possible.
I did tai chi for a while, just given up, I could see I could easily hurt a knee, even though it's meant to be good for bones. I've chosen to do yoga at home instead.
I take your point about scores, supposedly the dexa scan not accurate for small boned short people. I will have to readjust my thinking if I get a less favourable score in the future.
I am really sorry to hear about your experience, and I hope you recover well, it sounds very difficult. In fact it is difficult to hear about any bad experience, I wish everyone well, life can be so difficult and unfair.