My primary care doctor did a quick a1c test in office that came back negative. I definitely don't want diabetes but it runs in my family. I'm 26 years old and I had gestational diabetes with my 3rd child. My foot keeps tingling. Blurred vision and at times throughout the day I become so hungry that I have to eat right then or I feel I might starve or pass out. I'm not overweight I'm actually really skinny and only 26. So my question. Is there a better way of testing? Is it possible the a1c test was unreliable?