I used to have moderate hypglycemia. During my first pregnancy, my body miraculously 'cured' my pancreas (pregnancy has been known to do the strangest things) and I no longer have an issue with it.
I constantly needed to eat; I kept very good track of my body and what I was feeling, so I knew exactly when and what I needed to eat. Typically I ate something small every 1.5 hours. Protein is very very important as it will keep your blood sugar from dropping too fast. So typically I would eat alot of eggs, seeds, nuts, meat, etc with my meals. I was also on a range of different natural remedies to help my pancreas, and digestive enzymes so that my pancreas wasn't overworking so it could heal.
The pancreas is typically damaged by poor diet (too much fat and sugar) and alcohol. A low fat diet is key, and losing weight is essential for an overweight person.
If my blood suagr is low, I will usually feel very warm. I get confused/frustrated/upset/sad very easily. My brain seems to slow down, I can't mentally process things nearly as easily. If things progress I get shaky, I feel faint, and I might pass out. It took me a while to realise the beginning signs (mainly feeling warm and emotional). If my blood sugar had already dropped too low, eating something high sugar like candy and keeping it under my tongue would pick me back up again or tide me over until I could eat a normal meal. I constantly carried candies or chocolate on me, just incase.
I have no experience with diabetes, but this is my experience with hypoglycemia. Hope this helps.