eg currently if I'm on a phone for 30mins.. if I don't want to risk a crash I need to get off of it at that point and I can't make calls like that every day. If I do not time it, I will often over do and regret it. Even the time being put on hold on a phone affects me as my brain then has to hold in mind what I'm going to say when it's answered
Thats generally what I find and I try to limit my rare phone calls so as not to over-do simply chatting. And 1/2 an hour is about it.
Something which is really tough is: being put on hold and the horrible loud music comes out of the phone and this can go on for a very long time.
Recently, I had a good day and spent several hours lying down with books etc...doing science work which I used to do with no problem for the last 48 years. BAsically- thinking, pondering, looking at line drawings and comparing them with plant specimens I'd collected, keys etc. Technical terms in latin...Well, 3 hours of that maybe.
I crashed big time- just as intensely as if I"d done some physical thing- I just did not have muscle aches that happen from doing something more physical. And I had no emotional- things going on ..so it was just this observing how much energy it takes to hold concepts in the brain, keep that network of concepts connected, and then work thru a mental issue.
So what to do about it (considering getting this B12 )....?
Well, I've not tried to even do it again- for several months (great, lousy plan).
If I do it again: (I will)....its: spend far less time ....its don't do more than one hour of that- not 3.
I've been doing a bit of: painting, again. Mostly this means the kitchen table is no longer available and is covered in the art mess. But ultimately- I can hardly do it for very long at all. Its another- WOW this takes energy to hold concepts- think- ponder-decide-do-think. I did one of these loose undemanding methods (just pour colors on the paper) and 45 minutes of that was just exhausting. It felt like I'd ran a relay race.