Hi, welcome to BW
First off, (((HUGS))) I'm really sorry that you're feeling so low.
You've got a few things in your post, so I'll try to address them, but please ask again if I miss something.
I have been trying to get her to sleep in her crib, in her own room. I always follow EASY and begin wind down when she begins showing signs. However, once I get to the point of saying nighty night for nap time, she cries in my arms, until finally falling asleep.
This could be all kinds of things. She may not yet be tired, she may be overtired, she may be uncomfortable lying down though you say she's slept reasonable naps in the Moses basket, so maybe not that. She could be overstimulated or having discomfort. Many others - hungry, sore, etc.
Can you post an EASY - just what your day looks like?
Have you read about mantra cries?
Recognising a Baby's CriesYour job as a mum isn't to make sure Emma never cries - its her only method of communication at the moment, so she'll cry for everything. Your job is to meet her needs by cuddling, loving, feeding, clothing, giving her the opportunity for sleep, keeping her clean and healthy.
I EBF and have lots of milk, but I can't help but feel if I fed her differently maybe her sleep habits would be better.
When you say lots of milk...
Oversupply and Overactive (Forceful) Let-Down How often are you feeding? Are you offering both sides at each feeding? Are you able to tell whether she has drained the breast before moving to the other?
WRT naps and location of them, at this age, really if you're getting the night and one nap in the crib, you're doing well, your main priority should be setting up a routine that works for LO. What was it about the night that meant you starting co-sleeping? I just wonder if the unsettledness was related to BF (not saying to stop, just wanting to offer some help in that area, BTDT with terrible nights due to oversupply). Co-sleeping was not recommended by Tracy at any age, and SIDS prevention advice warns against it in general.
We don't believe in CIO here, we won't be suggesting that. I also can't really tell you what you must do - I can suggest things that I've seen work for me and other mums. Only you can decide what you feel comfortable with, so whilst we can give you suggestions, we can't make your decisions for you.