My daughter is 2 weeks away from turning 6 months old. She has been a great sleeper going from 630 pm to 8 am. Suddenly today she's woken up at midnight for a feed. I could hear her belly grumbling. She eats 7 oz 4 times a day of formula. My doctor says no food until 6 months. Would 20 days really be a big deal? I really think she needs some cereal before bed. She was born at 9.0 lbs so she is a big girl. Is it normal to have sleep regression? Would the cereal help?