Hi first I must say I'm not on insulin just metformin and gliclazide
I have also had a couple of coughing episodes where I'm coughing but can't inhale any air for my next breath which is really scary because I wouldn't be able to call for help
I have been blaming my blood pressure tablets but I think the side affects should have worn after after 12mth on them
Have you spoken to your Dr about the chest tightness? I'm trying to avoid Drs etc until the flu season had passed since I've refused a flu jab
Please let me know if you do find out anymore as it is very scary not being able to breath properly
Jan