Hey @Appleblossom happy to see you around and the friendship seemingly always here between us after all these years. 
Thanks for hearing and responding. The best thing at the moment is being kept company with it, especially by you and others who know this mental health journey with conditions that give us far less peace of mind than anyone would hope for.
As often, you really get the complexities in a number of your observations in the previous post.
Reminding myself of the similarly difficult emotional experiences so many families go through over xmas helps a little as well.
My fear is my own irritability and anger that arises under stress. Staying with Mum is high on the stress list. When over-the-top irritability comes out in me these days, or unreasonable anger outbursts, my mind is really shattered. At least these episodes tend to be very brief these days, but the dark rumblings of mood can then deepen as a groundtone and the resilience drop further.
This is not the kind person I intend to be, and am in practice a lot. It's hard to reconcile the split in me, sickening.
Another aspect of things is that Mum being 86 is becoming more dependent on others, probably more than she realises herself. Being functionally disabled myself, and her only daughter, is not easy in terms of trying to organise everything for her needs. You may remember, the main reason I did not have kids is because I have been consistently unable to even look after myself properly throughout my life and simply saw disaster looming for all involved if I had a child.
Of course, Mum in her advancing age and deteriorating health is becoming like a child I need to care for now, at least when she is coming to visit here. Being her only daughter, I so wish to rise to the occasion for Mum. But even without this current chemical depression from the shingles med, caring for myself let alone others is a high reach. and has me walking a tightrope at the outer edges of my practical capacities.
If life was something that happened completely while sitting at a computer, I would be a multi-tasking whizz. Meanwhile in ordinary daily life I need to list out every step involved in getting out the door to an appointment, and double check repeatedly for what time it was I need to be in the shower. Laugh or cry.
Anyway, with luck, the worsened depression and anxiety I am experiencing now may pass before Mum arrives and I will be more stable, stronger and resilient, and all will be close to well for the 12 days she is here.
Of course that also depends on the Qld border opening on schedule on the 17 December!