So for the past 7 years (since I was 16) I've had what I've been told by my mother as low blood sugar issues (she has the same symptoms). My symptoms are: feeling clammy, tired, shaking/trembling, sometimes headaches. Sometimes it happens when I go hours without eating other times I can snack through the day and it still happens. Its sudden onset. When I was 17 I went for a test (maybe diabetes) and it came back negative... the hospital never had me fast the night before or anything. They just took blood.

Any idea what test it was or what may be causing my symptoms?