With some patients the pin can break. I would definitely go back to the surgeon and get an x-ray. This way it is possible to see how the pin is doing. This will let the surgeon know if the pin is under a lot of stress. At this point if you had periods with no pain and you are having pain now, that is not normal and not the normal course of surgery, so it should be looked at. If the pin has moved at all, it could be pressing on something that is causing this increase in pain.