Emily. Sorry to hear about this. It happens to me once in a while but much less now that I am on a pump. It's possible, if you are exercising, skipping meals, maybe your basal is just a tad too much, to empty your liver of glucose. once that happens, all the carbs you will eat will go to "recharge" your liver.
Suspending your pump was your best bet. I don't know what you were eating but this is one time a good old regular coke will help do the trick. When this happens to me I use glucose tabs plus fruit. Mixed carbs (with protien or fats) will really mess you up because it will only slow down absorption. Alcohol could knock you on your a$$ too because it really slows down glucose absorption.
oh yea, your glucagon kit will not work, because that injection only causes your liver to dump. if there's nothing to dump it won't help at all.
Hope you are feeling better!.