You're absolutely right about the cyclic re-construction of optimism. The interesting thing is that this progress can actually be quantified on a biophysical level, so can anxiety.
There are several ingredients - the heart rate, heart rate variability, the breath, and the mind.
There is a very interesting relationship between the breath, the heart, and the mind. Different patterns of breathing can actually determine our state of mind and vice versa. Most of the time this happens on a completely subconscious level.
If you encounter danger in the wild (ex: a wild animal such as a bear), your breathing pattern and heartrate will change immediately in order to accomodate a flight or fight reaction by the mind and the body.
The same thing happens during the anxiety episodes you are describing. Whatever the cause of the emotional reaction is, this is what is happening on a biological level.
The brain activity patterns can be mapped to the pattern of your heart rate variability, which in turn can be linked to your pattern of breathing.
Often, when we are uncomfortable, our breath shuts down. We go into a protective sort of breathing pattern, where we either hold our breath, or take very short shallow breaths.
On the other hand, when we are at peace, our breath is typically long, deep, and slow.
Here's what I would suggest. Tomorrow at your daily meeting, don't do anything out of the ordinary. Just observe the quality of your breath. Is it shallow, is it deep, do you make pauses? Is the pause on your inhalation or after your exhalation?
Then on monday try the breathing exercise before the meeting, and again pay close attention to your breath as you speak.
This will give you a baseline measurement without intervention and one with.
There is an excellent site that describes the scientific research which describes the heart mind breath interaction. You may find it interesting from the scientific point of view, and also in the ways in which this may apply to your situation.
http://www.heartmath.org/research/science-
of-the-heart-head-heart-interactions.html
Feel free to write back, and let me know how it went.
All the best,
Daniel