Glucose level in non-diabetic

Howdy, I have a family history of diabetes, and I have kidney disease (apparently that increases the risk). Anyhow, my cousin checked my blood sugars and noticed they were 4.1 three and a half hours after eating, she frowned and looked concerned and said it should be better, but it isn't bad. Is this normal? With family history and me having kidney disease is it worth seeing my doctor? Thank you