Sorry to hear this :( Dancing is meant to be very therapeutic!
Labral tears are horrible but surgery repairs them, it'd probably be keyhole which is quite interesting in itself (I saw pictures of my fairly similar hip surgery) and recovery is really not too bad.
At the moment, I don't know - I've doctors to see and scans to be made. Apparently, it's not good at fixing itself.
Saying that, it's pretty clear to me that the main damage was done back in '12, about half way through a marathon.