Low Blood Sugar

I am 4 1/2 months post op, and recently was told I was not eating enough to sustain a normal blood sugar level (How funny is that - before I was eating too much). My doctors advised that I eat smaller meals more frequently, and carry glucose tablets. My problem is, my body absolutely CANNOT tolerate sugar. I need everything sugar-free. Does anyone know if there is such a thing as sugar free glucose tablets? Also, has anyone else gone through this experience? If so, does this ever regulate, or it is like this forever.