Six months my arse. I have a friend that when a "cyst" was found in his stomach the doctor said let's wait 6 months and then retest. He did, by then the cancer had spread. I'm not saying this is your prognosis, I'm just saying don't wait.
Good luck to you,
Abbey
Dear Llilly: In the absence of any more explanation, I would want this to be checked now. If it needs rechecking now - why wait 6 months. Find out what is going on.