Girls, who had this? They saw a doctor, she said that the baby has ele…

Girls, who had this? They saw a doctor, she said that the baby has elevated acidity and because of it he poorly sleeps at night, she said to give porridge at night. We're six months old, only started introducing complementary food (cucumber, broccoli and carrots, eats not very much). How should I act, don't want to harm the baby