This is kind of silly.

My son was born at 35.2 weeks. He is currently 12.3 weeks old, 7.5 weeks adjusted.

He is officially out of NB diapers. He's also starting to fit into some of his 0 - 3 month clothes. And his NB stuff is starting to get a little snug.

I don't know why this makes me sad. I'm super happy that he's getting bigger and growing and whatnot. I love that he's getting more animated and reactive every day.

But.. he's getting bigger. And that makes me sad. Stupid irrational baby blues  

I know how you feel. My LO is almost 6 months old and she is in size 4 diapers and 9 month clothing.

I CRIED the other day because my 6 month old pulled himself up on the coffee table. He's growing so fast! ( I think some of that crying may have been because I will NEVER get anything done, EVER again lol)

My 33 weeker is turning 8 months next week. He says momma puts his arm up and sits alone. He is in size 3 diapers eating solids and wearing size 9 months. Im sad too. Glad he is growing and thriving ...but he is our last baby and only boy.  

It's not silly.
I just packed away my daughter's clothes that were 0-3 months to store them away and cried.. She never even got to wear half the stuff  
It's just sad. We don't have to explain to anyone why it is, but it just is. They're babies and already growing up so fast.
DD is 4 months and I already miss her being a newborn. She's trying to sit up and has discovered her voice, and I'm happy but she's just a baby   I miss her being so little..

I feel the same way too!! It's hard to see them getting bigger and not being "babies" anymore!