Sometimes the overhead bins get full and the flight attendants will start collecting bags to put in with the rest of the luggage, but I keep insulin (diabetic) in my handheld bag, as I may need it during the flight (not to mention it might go bad if it was stowed with the other luggage due to the temperatures) - without sounding like an ass and saying "my bag is more important than your bag", what can I do to avoid this situation?
Yes, boarding early to ensure I get my bag up there first is a good idea, but not always possible when there is a short amount of time to change flights (especially in a large airport).
Is there anything I can do about this, or perhaps a way to resolve it more discretely?