Hi all, so sorry to hear of all your experiences. And difficult choices about medications with pregnancy.
This won't be relevant for everyone, but @sciencepotato as you mentioned onset of asthma mid-30s, linked to allergies and not responding to treatment, I'm wondering if you've tried a low histamine diet to see if it helps with underlying triggers? As a neuroscientist I'm sure this sounds woo woo but I've got a PhD so hear me out.
I had similar experience, sudden asthma attacks mid-30s. GPs/ asthma nurses put me on loads of meds for 6+ months. Didn't get asthma under control, and developed new symptoms from the steroids. Was debilitated, couldn't leave house on my own, multiple days when couldn't get to work or had to leave early.
A weird food reaction got me researching and I discovered histaminiosis - recognised everywhere but the UK. Tried low histamine diet out of desperation. Results were dramatic. Instant reduction in inflammation. Was off all meds within 3 months. Followed diet for a year, gradually reintroduced foods in that time. No attacks since, haven't used preventer for a few years.
Obviously not relevant for non-allergic asthma or childhood onset. But as I'm sure you know, inflammatory conditions linked to overactive immune systems really common in women 35-55, and once it takes hold it's hard to stop. Often the meds are just dealing with symptoms but can't address cause.