Ashie, I don't know too much about lactose or protein allergies in formula fad babies, but the symptoms your son has really does sounds like a younger version of my son who does have a cows milk protein allergy. My advice would be to take him to a paediatrician, someone who is familiar with babies and what is and is not normal. Your doctor seems to have given you the brush off and it does sound like something is upsetting your baby