Slightly losing it

My newborn is 6 days old and man is she super high maintenance. I feel like I spend every minute of the day trying to keep her happy. I mean way more then what I think is normal. I don't remember my first being this difficult. I don't know if she's colic or what but every morning we spend 3 or 4 hours crying and fussing and no matter what I do or try nothing seems to make her happy. I'm already finding myself walking away to let her cry just hoping it'll wear her out enough to sleep. Is anyone else experiencing this?