Your baby needs the calories. Shorter feedings may lead to a need for more frequent feedings. In the first couple of weeks, if your baby has three or more good-sized bowel movements per day and six or more wet diapers per day, he is receiving a good supply of breast milk. Your baby should be back to birth weight by 10 to 14 days of age if breast-feeding is going well. Therefore, the 2-week checkup by your baby's physician is very important.
Burping is optional.
Its only benefit is to decrease spitting up. Air in the stomach does not cause pain. If you burp your baby, burping two times during a feeding and for about a minute is plenty. Burp your baby when switching from the first breast to the second and at the end of the feeding. Your baby doesn't seem to be gaining adequately.