Hi, Thanks for writing in. It is possible that you have higher than insulin levels circulating in your blood. This is causing the blood glucose levels to go below normal and that can cause problems like tiredness or dizziness. This if confirmed might be the opposite of diabetes where the insulin does not act on receptors. You should consult a doctor who deals with conditions of pancreas. They can be gastroenterologists or endocrinologists. They have to do certain tests to know the source of high insulin and few tests like insulin levels in blood and ultrasound and CT scan might be asked for. There are small tumors called insulinomas in the pancreas which secrete excess insulin and a search for such tumors is indicated. Insulinoma is a benign tumor of the pancreas in 90 percent of patients and removal of the tumor cures the patient of the symptoms. Please do not worry.