Haha I was the exact same. My OH thort I was crazy about getting upset over stuff like that, I've actually saved one newborn nappy and put it in his memory box so I can remember how small he was (sad ano haha).
I hate to say it but it doesn't get easier, I still get upset every time he outgrows something, they grow too fast. I totally agree that pregnancy seems to go so much slower than when there here.
we changed B to size 2s but i think her legs are still a wee bit small as she tends to leak more in them but size 1s are just a bit too tight. she needs a 1.5 haha. I had to bag up all her newborn and up to a month clothes as they dont fit her anymore. that made me a little sad but mostly cause she only wore some of them once or not at all and they were expensive. does that make me a terrible mother?!
https://i134.photobucket.com/albums/q82/Tag2290/051020133077.jpg
Your baby sure has good taste in sleepsuits, lol.