I've gotten it quite a few times too..Usually happens a few times each cycle...
I've thought about this alot ,as to why it happens ,and I am convinced its when I rush my injections...You know the scenario...the wife shouting out ...whats keeping you in the bathroom ... and you just jam in the pin and unload it as fast as possible...Well thats usually when my "fina cough" kicks in...I have adopted a rule of thumb ....take 30 seconds per 100mgs of fina and so far no problem......Although it may be bs....who knows??