Hi hon someone gave me this advise on the breathlessness. Apparently it's sometimes known as 'air hunger':
It often results through over breathing (consciously trying to control the air intake) and without realising it, your oxygen levels in your blood are higher than normal. (Perfectly harmless but uncomfortable feeling).
It's difficult at first, but you need to rebalance the blood gases. And ultimately allow your automatic system to re take control of your breathing. (If you imagine this same system controls breathing whilst you sleep, and needs to do the same when you are awake) otherwise things go askew.
The following technique is often helpful.
Take a short breath in through the nose for 3-4 seconds and breath out through pursed lips for 7-8 seconds, continue until your breathing relaxes.
If you find it too difficult to breath out for any length of time shorten the timing at first. Provided the breath out is longer than the breath in.
(You are trying to rebalance oxygen and carbon dioxide ) - if it gets really bad, try breathing through cupped hands (think of the old paper bad method used in severe hyperventilating )