Another update- yesterday I took my utrogestan 7 hours before bed, didn’t eat within 2 hours of bed and had an anti acid tablet before bed, and filmed myself sleeping and nothing happened, no breathing episodes.
I suspect now that it could have been eating close to bedtime and stomach acid coming up, causing asthma, as the GP thought. I will continue avoiding eating close to bed and taking the anti acid tablet and gradually move the utrogestan towards 2 hours before bed and then I will find out what it is. I’m just so relieved it didn’t happen last night and that it could be fixable.