Surgery to repair a sprained ankle

I have sprained my left ankle for years and just accepted the ocasional discomfort but two months ago I sprained it really bad. I heard the popping and my foot turned black and blue. It hurt so bad when i did it that I threw up and had to go to the ER.I went to my Dr, and he ordered a MRI/Xray. and in the mean time to go to PT.
I now have the results back but will have to wait another three weeks to be seen by the Orthopedic/ankle Dr.

The MRI said...Substantial injury of the lateral collateral ligament. The fibulocalcaneal ligament is markedly thickened and irregular, with at least partial disconuity. A balled up appearance of the ligament near the calcaneus suggests that this is in fact probably a complete or near complete tear. Also my ATF ligament appears chronically avulsed from the anterior margin of the fibula.

Do you think I will need surgery. I have sprained my ankle 4 times since this last injury and I feel PT is not helping. I have been wearing an air cast to help.