Hi... Since your symptoms are probably following an infection, I think you may need evaluations to rule out possible myositis
.. Get a serum CPK levels checked. Antiinflammatory medications and good rest may be needed.
can play a role, if you have history of anxiety in the past. But other organic conditions have to be ruled out before considering anxiety disorder as the only reason...
As a physician, I will be able to provide you with better opinion, if the values of CPK are known. Hence consider getting a second opinion
from a specialist..