If you have been experiencing (notice the presupposition there? I put it in the past tense, which presupposes it has happened, but is not necessarily going to keep on happening) feelings of overload, or anxiety, or whatever you want to call it that's just too much and uncomfortable (notice another presupposition, I used "feelings" of overload instead of simply overload. It presupposes we are going to work on the feelings you've had, not change something huge, like the whole environment ) a useful technique is what I call monitoring your arousal level.
• Imagine a continuum of emotional/physical intensity with 0 being as relaxed as a wet noodle, and 25 hair on fire with intensity.
• Determine the range you want to operate in most of the time. I like to be somewhere under 6 myself.
• Then, during the day, at intervals, whenever you think of it, ask yourself, "What number am I?" If it's over a 6, or wherever you've decided you want to be, use one of the techniques below, or some another one of your own choice, to bring it back down to your comfort range.
By monitoring your arousal level for several days, and then from time to time as needed, you will train yourself to stop disregarding your own internal state, and you will eventually automatically know when to do something to reduce your arousal level.
You will also reduce tremendously your adrenaline output, and the symptoms you've experienced in the past that excess adrenalin has produced.