>What U want to do to solve the problem is REDUCE the loss of CO2 (by regulating your breathing) or INCREASE your CO2 level (by breathing in a bag for example).
Sorry, what I should have also said is that this bag treatment has no basis in physiology. If anything, breathing a gas with a higher partial pressure of CO2 (from the bag) will only stimulate a stronger respiratory effort. The first option is spot on. If there's no physiological reason to hyperventilate - the reason is psychological. So.. just calm down!