Have i mentioned my knee injury recently...................?
Yeah i went on crutches mate, month or so after ACL surgery, i sat about half way up the itchen but end of row (ideal so then crutches dont get in the way and i could straighten my leg etc....)
Sure you will be fine.
As for the ankle, if it still hurts in a month or so go back and ask for an MRI. Mate of mine has done ligaments in both ankles and eventually had to have one of them operated on. They still give him grief now but he plays Saturday and Sunday and trains twice a week (albeit the Thursday training is only an hour of 5 yard passing....) @The9