um, i would talk to your doctor and have it checked out. maybe an ultra sound or something. not to scare you, but just to make sure that it's not anything serious. especially since you've had it in this long and no problems before. all of my problems started shortly after having it put in. please do not let this go on, get it checked out. you need more than just a reg. examination, just to be on the safe side. i hope everything is ok.