BMI calculations

So Glow is giving me advise on my BMI, according to the BMI charts I am overweight... In reality I am not. I am 5'0" and 130 pounds size 2 pants small top.. I am a clean eater, mostly organic with a few indulgences from time to time, and exercise almost daily for 60+ minutes either cardio or strength training. If Glow is making assumptions on my BMI based on two small factors, height and weight, how do I know if their assumptions of my fertility are correct?