I realised earlier that I've got a triple whammy of upsurge in anxiety having stopped not only the Aripiprazole, but also the Propranolol and Melatonin. The Olanzapine has yet to settle in properly.
I've not experienced anxiety like this in a long time, though everything I'm anxious about are 'normal' triggers for a lower level of anxiety, as it were, for me.