My vitamin d is 21 and i am on medicine for 8 weeks i been having pains in my thighs arm and legs is it from vitamin so low wbc is normal ?

Vitamin d: Muscle weakness, bone pain, respiratory infections, depression, multiple sclerosis, type 2 diabetes, chronic inflammation, sleep apnea, increased cavities colon and other cancers and even erectile dysfunction have been associated with low vitamin D levels. These associations have been seen usually at much lower vitamin D levels than yours and I doubt your symptoms are due to vitamin D deficiency