Thanks for your reply. I've had this chest tightness/asthma for about 9 months now. I have it 24/7. The formal diagnosis of asthma comes from blowing into a spirometer -- it takes me about 9 seconds to blow out the volume of air I should be able to blow out in 3 seconds.
Other than that, it's atypical for asthma. I have no wheezing ever, no coughing up phlegm, my sinuses are clear and I can always breathe through my nose.
It's sometimes a little better, sometimes worse, but it's there all the time.