Mrs Moo
You won't get a hypo without taking some medication to cause it. As far as I know, only Metformin, Starlix,Byetta and Victoza don't ever cause hypos.
Hyper is more of a problem. Many of us "old Hands" have set our own BG upper limit targets( mine is 6), so may not have any signs of going just a little over. I Never allow my BG to go much over. Even when trying a couple of experiments with food, I have kept below 7.5. therefore, I never feel hyper.
I work on "If I don't eat it, it can't get into my blood".
Hana
Ps I now get migraine with the visual disturbances and nausea, but no headache.