So, you tried various prescription medications with no help.
More trial and error approaches? Hmm. It seems that successful treatment rates get alarmingly low, when doctors rely on certain tests which return negative results.
Well, I'll make an assumption that you are a predominately mouth breather.
The one single significant point, that I want to make here is, how critical it is to breathe well through your nose, for this alone can affect not only your breathing, but your entire life!
What makes nose breathing such a big deal? You're right to be asking!
Simple.
A. Nitric oxide, a gas made by your nose and sinus mucous membranes in small quantities, when inhaled by the lungs, greatly affects the lungs' capacity to absorb oxygen- up to 25% more! That is HUGE!
Also it assists the immune system at fighting off bacteria and viruses,
helps in gastric motility, plays a significant signaling role in the cardiovascular and nervous systems, regulates blood pressure by dilating arteries, improves sleep quality and memory and on and on it goes!
Nitric oxide was named “Molecule of the Year” in 1992.
Three US scientists—Robert F. Furchgott, PhD, Louis J. Ignarro, PhD, and Ferid Murad, MD, PhD— received the 1998 Nobel Prize for Physiology and Medicine.
There are over 65000 studies done on Nitric oxide, since it it is involved in so many processes in the body!
B. Your nose produces up to 1L of mucus a day and if you're not breathing through the nose or your nose is not functioning well, mucus may become stagnant and lead to sinus and ear infections.
C. Your nose is connected to the nervous system and if not breathing through the nose, blood pressure, stress response, pulse rate may be affected.
One final note: Avoid sleeping mostly on your back,in order to optimize nasal breathing and to help avoid mouth breathing, post nasal drip and higher risk to obstructive sleep apnea.
Oh, almost missed this: Breathing retraining!
Please go to the Normal Breathing website, for details. Over 400 pages of amazing information by Dr. A. Rakhimov instructor and trainer of the Buteyko Breathing Method which is a powerful approach for reversing health problems associated with improper breathing, and which I have studied myself.
This method really works well to the point, that I'm very interested in taking the instructor's training in 2015.
Hope this helps.
Cheers!
Niko
You are wise to see your doctor again.
The doctor will no doubt arrange for different check ups, and he can also send you to the hospital to get a lung function test done. He can do this at your appointment, but the equipment the hospital uses is more accurate.
It may be that you have "air hunger", may be get anxious and try to breathe more. When you feel like that, the best thing to do is to exhale as much as you can before taking a breath in again.
Make sure that you get a good night's sleep and have a good sleep hygiene. This means that you go to sleep at a reasonable time every night and not stay up playing computer games all night. Not having enough sleep can make you hunger for air.
If you have congestion and a post nasal drip, doing steam inhalations will help.
To do a steam inhalation, boil up a kettleful of water and poor this into a bowl (taking care not to get scalded). Put some Vick or olbas oil or any other menthol oils of your choice into the hot water. Bend your head over the bowl and cover your head and the bowl with a towel. Breathe in the steam for a duration of 10 minutes, by breathing in through your nose (or trying to) and then out through your mouth. Try and do this 4 times each day, but any will be better than none. You can do this for as long as you need to without getting any side effects.
My mother had severe GERD and severe LPR until I took her off acid blocker nexium and gave her betaine HCL with pepsin supplements to increase stomach acid (high stomach acid is rarely the cause of GERD) and digestive enzymes to help with digestion. Both conditions were gone in three weeks.
The bonus was 25 years of gastritis pain gone in about a year of taking these supplements. And one by one her long list of mental and physical health conditions vanished once her stomach acid levels increased. Once you can absorb your vitamins and minerals you can expect your health to get a whole lot better!
I personally have had shortness of breath from severe bradypnea due to hypothyroidism, iron deficiency anaemia, and magnesium deficiency.