OK started doing the buteyko method but wanted to share this video I found on YouTube

-Although we feel like we are suffocating /can't breath / are lacking air, the oxygen levels in our bodies are fine. In reality we have the opposite problem: we are exhaling too much carbon dioxide and this means we lower our body's CO2 tolerance

-When our body's C02 tolerance is low, there is negative feedback loop: the lower it goes, the sooner our body feels saturated with CO2, the more we try and breathe more and the worse it becomes. Essentially, anxiety has broken our breathing pattern (part of ou autonomic system).

-Bad advice: a lot of people advise to 'take deep breaths'. This is OK for panic attacks because it slows the hyperventilation. but for people with general shortness of breath, breathing more is not the solution: you actually need to breathe less.

-What to do about it: The buteyko breathing method: increase your body's tolerance to C02 gradually by exposing your body to exercises where you hold your breath slightly repeatedly over 20 mins, 3 times a day. take a normal breath in, exhale, and only inhale when you start feeling short of air. in the West, most people have to inhale within 15secs of exhaling. Healthy levels are actually more like 30-40secs.

Over a period of several weeks you should start seeing progress and after a few to several months, thing should be in the process of normalising.