I don't know much about this, so don't take my word for it, but it sounds like you may have "brittle" diabetes. Are you familiar with that term? From about.com: "Brittle diabetes, also called labile diabetes, is a term used to describe uncontrolled type 1 diabetes. People with brittle diabetes frequently experience large swings in blood sugar (glucose) levels. These cause either hypoglycemia (low blood sugar) or hyperglycemia (high blood sugar), which is more common and sometimes extreme."
I think in the diabetes community this term is frowned upon, and from other reading that I have done, it looks as though being "brittle" reflects more upon poor diabetes management choices and unhappiness. I don't know, just my two cents.