I do not know what state you live in but you should check and see if you are eligible for Medicaid, they sometimes cover dental for children. Don't beat yourself up over this. It is highly unlikely that it is from not brushing the baby's teeth. Some children are just more succeptible to dental caries. Was your baby given any Antibiotics
at birth? I have heard that there may be some correlation, google Antibiotics
and dental caries. In any case, you will want to try to avoid letting the milk pool and wipe baby's teeth with a soft cloth after every feeding. Don't believe the propaganda about milk and strong bones and teeth. Your breastmilk is the best and ideal food for your baby and cow's milk is not. It works like this, if your breastfeed, they will tell you it is because of the breastmilk, if you had bottle fed then it will be blamed on that. Sometimes things just happen but the sure thing is that your breastmilk is best for your baby.
They may have to cap the teeth to make sure the permanent ones are not damaged - just make sure they do not use any Amalgam
in the child's mouth. And for a new mom, you sound like you are doing terrific!