Danni,
Most breastfeeding mums would be freaking out if their baby breastfed every one and a half hours. We know it's normal for babies that age to feed that often, but equally normal for them to feed only once or twice or three times per day. No well baby will dehydrate himself in the presence of water or breastmilk. I know you have had a very stressful time. But try to relax. From what you are saying he is getting everything he needs.