Right after my first mile today it started to hurt and so far it has just gotten worse.
We think it was caused my unbalance in muscle and tight hamstrings.
to keep balanced muscles dont run the same direction around the track or on the same side of the road when you run. Switch sides every few minutes.
What helped recover? Time and stretching.
To prevent reinjury do calf raises and hold. Make sure you go straight up and don't turn foot at end.