What could be causing my blood sugars to drop even after eating. im not on insulin only metformin?

If not of diabetes: Treatment, in my 35 years of practice, I have never seen a case of reactive hypoglycemia. The disorder doesn't exist, if you're overweight the symptoms are a natural response to your glucose level returning to normal. They do not drop below normal or to dangerous levels. Finger sticks are unreliable don't fall for any fad diets or treatments. Lose wt if heavy.