hi, i have had asthma for about 15 years now; however, in the past week, i have noticed a new sensation of tightening/constricting of my upper chest / trachea. I dont know if this is possible, but it doesnt feel like the same sensation i get from wheezing, however it is difficult to move air and has resulted in a dry annoying cough. There is also the constant sensation of having a tickle in the back of my throat. This also hasn't been resolved with the use of albuerol, which also leads me to believe that it is not my asthma acting up. any ideas on what this could be or something to do about it.