This one happened about 5 a.m. so no chance of getting assistance unless I wanted to get the emergency services involved. I managed to stay calm enough to quickly hook Sue up to the oxygen and checked the level straight away - 99% which was reassuring.
I used the Buccolam 'fit buster' prescribed after 5 minutes. On the previous two occasions I've used it I've waited longer but I've read that fits are more serious the longer they go on. Almost immediately there was a change in her breathing for the better and within a short while there were the usual and reassuring small movements.
She's now sleeping quite peacefully - the Buccolam has a sedative effect so this is quite normal. Hope to post again soon.