Hi, I m a 52 y.o., active and fit female, 140 lbs., 5 ft. 4. Other than cholesterol a little high, I am very healthy. Usually have something like a banana and a low-calorie vitamin drink (i.e. Fuse) for lunch. Many times in the late afternoon I experience what I describe as the shakes .......but very light and the wobbly leg feeling, again nothing serious at all. Is this low blood sugar? What should I eat?