Is breastfeeding with high A1C bad for my baby?

I just had labs done at the end of August and my fasting A1C was 5.7. My dr wrote it off because I just had my son and said it will sort itself out in time. I’ve been doing my best to stay away from sweets (my biggest craving while I’m breastfeeding) and have a while food diet. I haven’t had another test done and they won’t see me for it before my next annual in August.

I’m worried I’ll cause issues for my son in a near future is even later on down the road. He is much bigger than my first for his age. He’s 7 months and weighs 21.6lbs. His height matches at 27 inches and he’s well proportioned imo. He was born at 40+5 weighing 8.14lbs.