Newborn sleeping a lot

My newborns 10 days old and she’s always slept a lot but now it’s intervening with her feedings. I’m suppose to feed her every 2 hours and it’s so hard waking her up to eat & if she does eat she’s sleeping while she’s eating and i have to keep moving the bottle to get her to suck. Her pediatrician said she wasn’t worried because she gained her birth weight back plus an ounce more but it’s making me nervous because now she’s only drinking an ounce is this okay? She was up ALL last night until 9-10 this morning maybe that’s why she’s exhausted? She also had like 5-6 bottles last night idk I’m nervous