Is this an odd thing to happen with my breathing ?

Yes, it could be an allergen. I would also recommend Mullein tea. You can find it lose leaf at a natural food store and it is very helpful for expanding the amount of oxygen intake in the lungs. Light yoga may help as you have the power to control you breathing and would allow more blood circulation ot your heart, lungs and head. Try goggling local yoga studios near you are try a class, through explain you asthma to the teacher before hand.