my baby is 15 days old.he cries during night for 5 to 6 hours & it appears like he is screaming in some pain. he always cries when we try to make him sleep on his back. he pulls out the breast during breastfeeding. he also spits milk many times during night. he gets hiccups also daily.he arches his back during feeding & keeps on crying.his tummy seems swoolen & bloated...l