I need help.. other mommies opinions.. please

Tia.

My little one is 7 weeks today.. and honestly ever since we've come home from the hospital it's been hell. I feel like my baby is always crying. It's very hard to soothe him. During the day my baby only sleeps about 20 min catnips then he is wide awake and angry. I feed him, change his diaper and burp him and he still doesn't seem content. I ALWAYS have to walk around the house and rock him to sleep. He is so fussy. I've been to the pediatrician and they say he is healthy but has colic. But it is ALL day long. Is anyone else out there going through this?? Or am I alone? I need some input. Is this just what newborns are like? I have no other children so I have nothing to compare him to.... I'm at my wits end :(