First time mom

Brittany

So I just had my baby January 21st she was 4 weeks early but everything checked out fine at the hospital and she's been to the doctor twice so they can check her weight and everything's been fine but I can't help but constantly worry and constantly checking on her breathing making sure she's still breathing and that she's breathing correctly or not having trouble. I'm having a hard time even sleeping at night bc of worrying. Is this normal?