Hiya, I don't wake up starving in the night, but i do often fall asleep in the daytime and then wake up ravenous! I can also eat a horse when I am first up in the morning, I find if I don't eat breakfast I'm like a bear with a sore head all day.
I do think it is linked with blood sugar levels and you should almost certainly get it checked out. I think if you're waking in the night to go eat, you need your bloods looked at.
Emma