Anybody else going through this

Amber

Last week my little man could barley wear a 3 to 6 month it was big on him so today I put a onesie on him thinking it was 3 to 6 months and I was in the middle of telling my hubby he could fit a 3 to 6 month hood but nope it was a 6 to 9 month. It’s like he went up a size in a week anybody else go through this