My advice is to get the best possible advice now and get physio to strengthen it.
I had ligament damage to my knee, thought it would heal itself, but it never did. Now its 8 years later and I still limp a bit. I so wish I got the right advice back then.
You need to get it sorted for the long run, not be worrying about the next race, there will be plenty more of them, but chances are a new ankle wont come along.
