I have not heard that Zoloft causes this side effect. It is possible I would guess. Also anxiety can cause many unusual somatic symptoms. IMHO I would definitely discuss this with your physician.
Perhaps someone else has had this same symptom and will post to you.
Hoping the best for you. :)
Moderator Anxiety ~ Panic Disorders
*~* Not a mental health professional at all *~*
Dx: Anxiety/Panic, Depression
"If you doubt you can accomplish something, then you can’t accomplish it. You have to have confidence in your ability, and then be tough enough to follow through.”