Surely this isn't normal

[Merida83]

My 20day old little girl seems to want to eat all the time. She started out feeding 3 - 4 hourly then got into set pattern of demanding fed at 3 hours, then it shortened to 2.5 hours, then 2 hours now it's as little as 90mins at times but never longer than 2.5 hours.

She was born 4 weeks premature so initially I thought her appetite must be a good thing as she's trying to catch up but now it feels like I must be doing something wrong.

Seeing midwife soon so will ask her but in the mean time hoping someone here can help.

Feel it important to add she is formula fed so I know how much she's getting (as in it's not a supply problem).

Thanks