My advice would be to simply to take baby steps and not expect to make the transition in a set amount of time. Get her used to one thing at a time, and it will be less traumatic for all involved. Try changing one thing at a time in the bedtime routine & try to avoid making another change until she's mastered the previous change. I expect you might be surprised how little time it takes and with less emotional upheaval for all. It's probably also best to start on a "good" day for her (i.e., regular naps, good mood all day).
We had our daughter in bed with us for her first few months, and transitioned her to her own crib by trying one night a week for a couple weeks, then trying two nights, etc. We, like you, had brought her back in with us for a period of time, and then got her back into her crib gradually. We've had to do this at least a couple of times.
You might also have to work through the transition of getting her into the crib by putting her down when sleepy, but not asleep and then staying with her until she drops off - you've probably heard all that before. My husband and I have also set a rule to not pick up our daughter, once in her crib, unless she's really inconsolable - or on her way to getting herself worked into a frenzy. One of us also tend to stay in the room with her until she's drowsy enough.
Every child is different though. Just try to strike the balance between setting the course you want, and following her cues.
Good luck - and happy birthday to your little one!