Growth spurt

Hi mummies, my newborn is 11 days old and she seems to be feeding around the clock over the last 2 days or so. Sometimes it’s challenging to get her to sleep after a feed even though she’s full, while other times she’ll get milk drunk and fall asleep easily. I’ve been able to express and latch but there are times when she doesn’t seem to be full! So our last resort is giving her formula because it tends to make her full longer. I read about growth spurt, could she be going through a growth spurt?#advicepls #firstbaby #FTM