Confused avout growth scan?

Today I had a growth scan ( im 34+4 ) because the midwife said in measuring slightly larger (though I dont look it) so I had a scan today,She measured spot on for weight and size...but they said they sizing wasn't much different from a month Ago scan or something ??? Now in really confused 😶 did she have a growth spurt early or something ? Anyone else had anything similar to this ?