My ex had that--if we were traveling ,she would threaten to rip my throat out if I didn't pull over immediately when she needed food.Scary.
Maybe try eating cactus (just the regular ebidle kind like nopales), they contain something that evens out a persons sugar absorption so that you don't get spikes and drops.
I start to get reaaaaalllly bitchy. I once broke down a door when my blood sugar dropped too low. The worst thing about it is the angry mood sets in before I actually eat, so I'm too pissed off to eat, which exacerbates the situation. I act pretty much exactly the same as Daniel (my boyfriend) does when he has no cigarettes.
I get like that too. I found out that I was hypoglycemic when I was pregnant with my oldest son. It didn't really come as a surprise though, I knew I could get brutal if I needed to eat. My sons get the same way. It's like, they can be angels, but then when they're hungry and get that drop in blood sugar, they have been known to get irrate. Seriously, I'm not exaggerating, they've had massive meltdowns, it's like they're not even the same kid! Which is why I usually don't leave the house without snacks on hand. Amazing how that snack will totally make them do a 360 afterwards. My daughter, lucky her, doesn't have that problem.