For each of us, there is a unique set of parameters. Sometimes my neuro will say it has been one attack, others she says have been a string of small ones. In other words, no one knows for sure.
The 24-hour rule is good for determining if a single event is likely an attack, but not a conclusive measure.
Only you can know your body and its relative normal. Do you keep a journal of your symptoms? I recommend it, get a dayplanner that is exclusive to your daily ups and downs, record everything that you notice. After time, patterns will emerge and it's very telling.
I agree with Vic, life can only be lived one day at a time and that is true for all people. Hang in there, you'll find your pace.