Twitching only in right feet. Help!

I am only facing twitching in only in right side of feet and that too near right side 2 fingers and above that only last 2 to 3 fingers and you can say that in between them . When ever I walk or exercise and run i will not feel it but after some time when I sit after 1 hour or you can say when I drive the car I feel feel it only when I drive my car . And otherwise I will feel it in a day like near by 2 to 3 hours any time in. A day and when I fold my legs or you can say crooss my leags it will not happens . Please help me as this cause me anxious and i feel stess due to it . I am out concentrating only on it . Please help me dr . I am vitamin D deefficiant and yes it started 2 days back only .and yes when this started i feel muscel spam near by neck also but now that is ok but this is the new issue . Please help thanks