My baby is 5 months 10 days old. From past fortnight he wakes up every hr at night to take feed. He drinks only for 5 minutes at night and then goes to sleep. He remains cranky even in the morning as in the morning also he drinks for 5 minutes. His wt is 7 kgs. I am breastfeeding him after every hour then also he is lean. What to do. kindly suggest.