I'm actually gaining on all the health problems now. And I promised I'd tell you all what I found helpful.
Realising that the far worse than normal asthma of the last few months was probably due to stress was the key in this case.
Over the course of a couple of weeks, I focused on tai chi, meditation, gentle walks, etc. (and also just telling myself that I was caught in a vicious circle where being unable to breathe was triggering panic attacks which were making the asthma worse, etc.)
The asthma is now back to its normal level for this time of year.
I've still got some remaining stomach pain, but it's not nearly as bad as it was, and googling suggested that IBS was a strong possibility. I've had irritable bowel syndrome before. It's essentially caused by stress - so no surprise that it's responding to the same treatment I've been giving the asthma. It always vanishes when I'm dancing... (ie. when I'm happy and distracted)
Things that helped:
1. Tai Chi, Leia Cohen in particular.
She has several 5 minute tai chi videos on YouTube - this first one is now upto 13 million views...
I subscribed to her app a year or two ago, and have found many useful videos there. I use one most days. There are some that are especially helpful with hip problems, great for people who spend too much time sitting down. (helpful for piriformis syndrome too)
2. Meditation
I use Insight Timer - This site is free and has thousands of guided meditations on many subjects and also relaxation music. I have the paid version purely becuase it was so massively helpful when I had depression five or six years ago that I would gladly have paid them far more than the annual fee in gratitude. (You get some handy bonuses with the paid version, but the free version is still fantastic)
3. Dealing with pain
When my sciatica was really bad, I got some help from Curable (I had the operation on my spine not long after, so didn't get to test it on to the full, but I did find it helpful enough that I've kept the app, though I may drop it soon as I've memorised the best bits)
It's essentially a brain-training technique. I read about the technique in New Scientist and went searching for a site that used the technique. In very simple terms, the brain can become conditioned to respond to pain in certain ways. This means that it sometimes continues to send strong pain signals in situations where they are not helpful. (phantom limb syndrome is probably the one most people will recognise.)
But the brain can also turn off/reduce pain signals in some situations. If you're running from a tiger, the pain in your hip is unlikely to stop you...
What the app does is to help you tell the brain which pain signals are too strong. eg. Sciatica...
I find the 'helpful assistant' on the Curable app to be incredibly annoying, but there are some very good exercises in there and I found them helpful.