I've been keeping a symptom diary for a while, and it makes absolutely no sense.
In the moment, if you asked me, I could isolate the things I thought made me crash:
- going longer than my limit on the treadmill (limit is walking 15-20 mins but I have a superhero complex that makes me want to do more when I feel I'm capable, and then it's all over)
- drinking alcohol
- getting stuck talking to somebody I don't want to be talking to
- really bad night's sleep (all nights are rough, just some more rough than others)
But then when I look back at my diary it's completely random. Yes, these things can and do make me crash, but there are just as many times where I've woken up in a crash for no reason after spending a perfectly good week pacing and sleeping and eating like a nun. And other times where I've decided to have a glass of wine and it's ended up being three and nothing bad seems to have happened because of it.
Somebody brought up to me the otter day the idea of delayed reaction to things. I found that really depressing, because jeez - if I accidentally do 23 mins on the treadmill instead of 20 but don't crash until two weeks later, then how the heck am I supposed to know anything?
I guess everybody's MMV, but 5 years in and I still feel like the more I learn, the less I understand...