DD, I don't have any advice about your DS. But you sound so upset and worried for your little boy.

DD sounds perfectly normal for a baby her age. I think it's probably that you're so anxious about DS that dealing with a new baby is that much harder. My little angel has just stopped screaming for no apparent reason for the fifth time since 6pm and fallen asleep by my side on the bed instead of being snuggled. They are unpredictable creatures, small babies!