I don't know what's best for him

and I don't think I can ever give him the best. Only the best we can. A sister in church said that it's the best for baby, no matter what he experienced.
I am afraid that pneumonia will have effect on his respiratory system. and too much antibiotic will be bad.
Good for you! You and your baby went through the worst. He will even better later.
再堅持ba.