Hypoglycemia? After eating food blood sugar drops?

I think I may have hypoglycemia. I've had symptoms of this for many years but recently I was able to buy a glucose meter and have been checking my glucose levels for the last two days. It seems that in the morning my glucose is around 81-85mg/dL even after breakfast, but before lunch it drops to the 70's and an hour to four hours after lunch or dinner it drops to the 50's or 60's and I feel sick, weak, tired, and in a fog. I also feel very hungry for sweets! I've noticed that when I eat a healthier meal my blood sugar goes down faster after...taking maybe an hour to go down, while when I eat sweets or high carb foods it may go up higher than my usual (83mg/dL) to the high 90's and then goes down after maybe 3 to 4 hours? Does this sound like reactive hypoglycemia or maybe hyperinsulinemia?