Certainly an Xray of both your foot and your ankle would be a good idea. In addition, I would recommend the use of an ankle support until the ligaments heal. I don't think the soft supports that you purchase in the drug store are very helpful, and I usually prescribe a rigid stirrup type brace that fits in the shoe. Ankle sprains are injuries to the ligaments, and if they are not treated correctly, they can lead to long term laxity. Since you mentioned you already had a problem, proper treatment is essential.