Baby’s weight gain

My LO is 1 month today. So was her doctors appointment and her birth weight was 6.5lbs today she is 7.2lbs but she lost a lot in the beginning she dropped to 5lbs and she’s gained all of that back so 2lbs weight gain in a month. Her doctor told me he’d like for her to be gaining more she’s ebf and it’s been difficult so that’s discouraging to hear.. how much weight did you baby gain in one month?