This should not happen, it is not normal. Report this to your dovctor, you wil need to do a special test which wil show both the sugar levels in body and alo the insulin levels in responsse to sugar levels. It is called some 'glucose tolrance tset' or something ike that. My sister had similar symptoms but she had them after eating rice meals, and the doctor said this for her. Now she is not taking rice items, she is better.