So looks like maybe I don't have asthma after all.
Had letter from consultant today (dated 21st April - really think they need to get their mail system sorted out at my local hospital as last one took ages as well judging by date on letter) saying 'lung function tests showed no evidence of asthma but I'd like to arrange a bronchoscopy as you may have vocal cord or upper airway dysfunction.'
So may be getting somewhere, though confused - I don't want to have asthma (EDIT: really don't, especially after reading posts on here about how bad it can get, so hope nothing comes across as me sounding like I somehow 'want' it.)
However, it would make so much more sense given my history; instead I probably have something weird I've barely heard of.
I've heard of VCD now and other people have mentioned it, but has anyone ever come across or been told they have 'upper airway dysfunction' which is not asthma? Only things I could find was Wiki article which suggested it would cause hypoxia (my sats are always normal) and ventilation/perfusion mismatch (have had VQ scan which was normal), plus something called 'reactive' UAD which is caused by irritants.
Sorry for another long post! Hope no-one minds if I still hang around here for a bit as this is such a great forum and not sure there's going to be one for whatever weird thing I turn out to have.