The asthma testing involved more TARDIS-looking equipment. It turns out I have asthma and an allergy to "some trees". This was something of a relief as I have googlitis from looking up the various deaths that start with not breathing very well.
How do you know when you are ok? Good health is not just the absence of illness. But keeping everything at bay gives you the breathing space (ha!) to ponder that life might sort of feel all right. Listening to Allegri's Miserere with that high, high C that sweeps the top of your head like a searchlight, it feels all right. I don't even mind that Winter is sitting like a cuckoo in the middle of May.
So that's a start. It may take a lifetime of pharmaceutical propping for this lifetime to be ok. But that's all right. That high C, by the way, was improvised. Much like life.