my son started throwing up Friday morning with diarrhea. gave him Pedialyte for 12 hrs and slowly started giving him formula again then he did good sat slowly was drinking 3 oz of milk. then Sunday morning he throw up again with diarrhea. So again Pedialyte the whole day then slowly at night backup formula small amounts he did good all day until now he just throw up again. I dont know what's going on. could it be the formula. hes 5 months and this has never happen before