Baby was born at 40 weeks weighting 7.9 pounds and 20.5 inches i had her two month appt and she's weighting 9 pounds height 22 inches. i am breastfeeding but i am extremely concerned about her weight gain. is that normal?

Maybe. Maybe not.: It all depends on whether or not the baby is happy and eating well, with normal poops. The baby's pediatrician can graph the measurements on the growth chart, from the visits after leaving the hospital, at about 2 weeks, at 1 month, and at 2 months. That would be enough measurements to get an idea of the rate of growth. Happy, well-adjusted babies are usually ok... but can weigh again in 2 weeks.