i am not hyperglycemic or whatever it is. why do i often get low blood sugar?

Can you answer ???’s question about Diabetes?:

very often after i excercise or run around or do a sport i get low blood sugar (my mother is a diabetic) so i kno how to test my sugar and i do it often to see if i am low *blood sugar* BUT I WENT TO THE DOCTER and did a test (( they drew blood and sent it to be tested for anything )) and they said that nothing is wrong with me but when i feel low i get shaky and dizzy and i feel like i can walk. can somebody please tell me whats going on with me? i have no idea and i really want and need to know whats going on with my body because i dont undersand this!!!

Management Of Diabetes Mellitus