Growth spurt 12 weeks

Olivia

Does anyone know if there’s a growth spurt around 12 weeks? My baby has been a little fussier than normal and is sleeping most of the time between feedings when before she would stay awake about a hour after eating and the sleep 30-60minutes. Now she’s falling asleep 15-30 minutes after eating and sleeping basically till her next bottle. I hope she isn’t getting sick!