Clarity in Chaos-for real!

Z just fell asleep in my arms. Without nursing. Without rocking. Without hushing. Without any movement what-so-ever. If anyone knows anything about Z and her personality these last few months you would know that this is major. I want to cry. I just might cry.
She is the sweetest, funniest, happiest baby ever. EVER.
Z has been the neediest baby out of our four. I thought number four would be easy. I thought, after having three children already, that I was an experienced mother who knew everything that needs to be know about babies. Z has proven me wrong on many levels.
Z, before we started supplementing with formula, wanted to be held or nursed-all the time! She was not content when she was put down. She did however sleep a good 4-6 hours at night. Good thing too. I might have gone insane if she hadn't .
The past three months have been more than exhausting. It's been a roller coaster ride of ups and downs twist and turns. Z was slowly, slowly gaining weight. About 2-3oz less than recommended. Long story short we have added about 1-2oz of formula to her diet on a daily basis and she is a completely different girl(kind of). She naps. She doesn't need to be held and doesn't demand to be fed all the time. Formula wasn't what I wanted and she hasn't been too fond of it either. She HATES bottles. Formula did make her gassy and we have since switched kinds and it has helped. This week she gained 6oz and now weighs 7lbs 3oz. She is finally getting to a great newborn weight! We've broken out the 0-3 month clothes for her! Soon I'll need to buy bigger diapers! The ones we bought were only suppose to last the first 6 weeks!
Deep breath.
I love her uncontrollably. But I've never met a baby like her before. My little Z-girl.