Have GDM. Does it harm baby to not meet minimum carb requirement a day and get low readgins post meals and snacks (70-90)? I walk alot after meals

Sugar levels. The 90's with activity not too much of an issue, but as you get down to the 70 range you run the risk of hypoglycemia and passing out and injuring yourself or baby. Plus if your sugar is low, so is your baby's. Try to adjust diet so post meal reading slightly higher to avoid low sugar symptoms.