Hello all. I recently came across this thread and decided to comment since I have had similar symptoms. When I was a child in elementary school I developed asthma after a bout of pneumonia. I have also been very sensitive to allergens and get severe upper respiratory infections from time to time. A say the least I was not a very healthy child growing up. It did not help that the house I grew up in had very dusty carpets. I took a control inhaler and an antihistamine and my symptoms improved as I got older. My immune system also improved. However, around the time that I began to go to high school from around 2009-2010, I began to experience some of the symptoms described in this thread. I would have to get up pretty early for the bus and would ride it with my older brother. I remember that it felt like I was not getting enough blood to my head and felt quite dizzy. I told my brother and he dismissed it so I did not really make much of a fuss. The symptoms were more manageable then. However,by the end of high school and early college the symptoms began to get worse. I would get lightheaded, dizzy, numbness in my hands and face, and SOB. It got so bad that I told my parents, but I insisted in not going to the ER since I knew that the symptoms would pass as normal after an hour or so. Other symptoms that seem to be related are an extreme thirst (I once drank an entire pack of water bottles in like and hour at a friends house), heart palpitations, loss of finger dexterity, and strong pulsating veins in my forehead and nose.
The symptoms seem to come in waves where it will affect me hard for like a week and then go away, only to return a week or two later. I finally went to the health clinic at school last semester when I was having trouble breathing. They tested the blood oxygen level and it was like 98%. The doctor referred me to an allergist. The allergy test that I took showed that I am sensitive to dust mites, but not much else. I have not gotten a chance to return yet since I am quite busy as a graduate student. However, it has been bothering me hard this week and I have been looking into it. I typed into google "difficulty taking a deep breath" and the suggestions included "… and yawning". I would say that I am pretty bad as describing symptoms to a doctor on the spot and for some reason I did not think to mention that it feels like I have an uncontrollable urge to yawn, but the yawn stalls out before the deep breath part. I included the yawning part in the search and it helped bring me to this page. I would also like to note that my symptoms seem to be worse when I am tired or after a big meal. Sorry for the long winded (funny since we are having trouble taking deep breaths) post, but I felt it necessary to share my story.