We went over to the nursing home today to visit BF's dad, and picked up his mom on the way. When we got to the home, she said she wasn't feeling well, so she stayed in the car for a bit. The minute she got inside, she had a fainting spell/convulsion, and continued to have problems the rest of the hour we were there. We took her to a walk-in clinic who have since sent her off to the main hospital in an ambulance.
I'm at BF's brother's house now (BF went in the ambulance), waiting for updates.

I'm hoping it's nothing too serious, but it definitely seems worrying, and I feel bad that BF is there on his own. (I didn't really want to ride in the ambulance as well, since I'm not family/not sure how comfortable BF's mom would be with everything - I know when I'm feeling gross, I want as few people/strangers around to see me feeling/looking gross.)
On the plus side(s), at least BF's cold seems over, so he's able to help out/be involved with all this, rather than curled up in bed. And at least he's here, I imagine he'd be pretty worried hearing about all of this second-hand from London.