out of interest, where should the pain be coming from if this was a positive test you would get pain behind the inside ankle bone. But this is not always positive in a problematic ankle, it depends on the stage of the injury.

Because of the length of time since the injury occurred any tear/strain should have healed and your now left with a probable change in biomechanics of the ankle.

My advice would be to see a podiatrist to check this out. I am not a big fan of off the shelf orthotics, if you get some custom made then you should get a better outcome because they are specific to you