I'm in my 50s and never had asthma before but I'm finding increasingly that when I laugh, if it's for more than a second or so, I start to struggle for breath. I've actually also had a couple of really scary episodes (that also happened when I laughed too much) where I literally couldn't breathe for maybe 30-60 seconds (although it felt a lot longer!). Dr Google suggests asthma but does it just start like that? After so many years of never having it? Anything else it might be?