My suggestion is to eat frequently if you arent' already. Also, I'd carefully measure carbs and not do so much up & down, since your system is obviously having issues with it. Keep carbs on an even keel for a week or so, then perhaps raise them by a few the following week, till you get to your point of comfort. Could be what you're eating rather than the carb level also, sounds like some experimenting is in order.

I'm no doctor, but maybe you should go get some bloodwork done too, people have contracted diabetes without any previous symptoms, but finding out through a glucose test what your body does could help. The glycemic level could also be affecting you, higher glycemic foods (forgetting for a moment about carbs) tend to wreak havoc on your blood sugar level.

Hope this helps, and I hope you feel better soon! Funny, about an hour after I eat, I'm starving again, stomach growling & everything, haven't figured that one out yet

LL