I think hunger can be caused by a number of things. I'd make sure your blood Sugar was low with objective testing. Blood Sugar monitors are cheap and it would be really useful to know your exact levels. How's your fasting blood sugar?
Low blood Sugar can be an ironic sign of early diabetes. If you have the risk factors or other symptoms, I would definitely be careful about it. For example, if you aren't doing any exercising, I would absolutely get a half hour walk in each day. That alone can go a long way towards keeping your body from breaking down with diabetes.