First of all, you may have asthma, however I suspect your breathing difficulties represent what are called Kussmaul respirations, breathing and air hunger associated with
metabolic acidosis. This problem is ocasionally confused with asthma, and may co-exist with asthma and/or a cardiac problem.
What you require, as of yesterday, is a glucose fasting test or an insulin clamp prototol.
Your symptoms, especially the fatigue, are associated with an insulin utilization syndrome.