MY 3 WEEK OLD IS ALWAYS CRYING.. PLEASE HELP!!!?

If she's not sleeping she's crying. and she doesn't sleep nearly as much as she should be sleeping. maybe around 12 hours a day and she's only 3 weeks old. she does ok at night its during the morning from like 6am to noon or 1pm that i cant get her to fall back asleep. she cries even when she's fed, changed, held in my arms. you name it. i can get her to quiet down with music/ swing /bouncer/ rocking/ laying her on her tummy, but only for like 20 min then she starts crying again. please help i don't know what to do with her.