Separation Anxiety. That is what it is called. She is no longer with you/hubby.
Try to make the crib cozy... my son had some baby safe stuffed toys in his crib, and still does. We also have the Fisher Price Ocean Wonders crib toy in his crib.
From about 6 months old, my son took to a lovey (a stuffed cow) and a pacifier. Sure, this is hated by some, but each Mom is different. It helped and I don't mind.
Some babies, just need to self-soothe... and this is not just something they do on auto-pilot.
Both my kids nursed too... I co-slept... but, on a floor futon in our room. Thus, our own bed was not crowded. Then once my kids fell asleep, I could just get up and do what I want. But I nursed on demand for the 1st year... and per our Pediatrician, this is recommended.... for the 1st year of life a baby's PRIMARY source of nutrition is from breastmilk/formula. NOT solids.
You might want to make sure she needs to nurse or just soothing. At about 9 months old, they go through a growth spurt too...and they naturally get hungrier and need more intake. A hungry baby, will NOT sleep.
All different approaches to the 'sleep' issues of babies. For me, I am more attachment oriented, and knew that at their own pace, they will sleep better and wean and soothe as they are able too. The lack of sleep for me, was just a given. But I know each woman has their own tolerance levels for it and the wakings.
Believe it or not, a baby will adjust, but they need help and it is not easy for them OR us.
My kids now, are GREAT sleepers and nappers.
I was never one for crying it out, or boot-camp style sleep enforcers. So that is just me.
Go with what is in your heart and gut. There is no one 'correct' way... and EACH baby is different. And know that other sleep phases and difficulties will arise, and then a sleep method may or may not work. BECAUSE when a baby is hungry or sick or teething or having night terrors when they are older... they will still wake, regardless of what 'method' you use. So at these special times of difficulties, you have to use another way of helping them to sleep/soothe.
My daughter HATED her crib. My son, from about 3-4 months old went from a Moses Basket to his crib with no problem. My daughter never self-soothed very well, my son was a champ about it and very self-directed. So, it really varied with my kids. But I never "forced" it upon them... knowing that they will grow and change each month... but what I did do is have consistency and routines to their sleep/nap times. To this day, I still have the SAME pre-sleep/nap routines for my kids. And they go to bed or nap with no problem.
It takes TIME... and effort on our part. Not easy... but try what you feel is best.
Good luck,
Susan