There are numerous times when I just have to stop, take a breath, think and weedle out the crap that doesn't matter. I just get overload if I'm thinking too much, hearing too much, seeing too much, have something on my mind and need to go do something, all at the same time. I feel my head fill and slowly seep down my throat causing great anxiety.
It's not a panic attack- it doesn't get that far. But I know I have to reduce the number of incoming stimuli before I pop.
And I used to pride myself at being a great multi tasker.