How exactly are you using your feet, while you are standing in the tack? My trainer has me using the ball of the foot (60%) with the rest of the weight distributed on the supporting toes (40%) give or take. I recall me using the wrong part of my foot (the outside) to support my weight - and that became a bad habit I had to break.
It sounds as if you may have strained some of the supporting ligaments or tendons. Calf raising exercise won't be of much help - I would suggest standing on a wobble board to focus strengthening and proprioception to the ankle stabilizers.
Wobble boards can be made of wood, similiar to a tilt board, or a round air filled cushion or disc (SitFit) that you can place one or both feet on. If you have really bad ankles, try standing on a sofa cushion or pillow. All you really need to use is a soft, unstable surface. Do it in front of a mirror so you can see your posture. Stand up, don't look down, and feel your ankles quiver slightly as they try and maintain their position. You may feel tired quickly, that's ok. Repeat several times; you can do that 2 or 3 times a day. This will also affect the stabilizers higher up (which is a good thing) at the sides of the hip.
Another good one for ankles: with your shoe on, put your toe in a loop of rubber tubing that is anchored at ground level. Lift your toes: up, left, and right, for 10-15 repetitions. Sit in a chair, and work only from the level of your ankle, no need to lift with your knee or thigh. Hope this helps!
Last edited by livelovelaughride; 01-23-2014 at 12:27 PM.