your symptoms definitely warrant a visit to the doctor. you might consider seeing either the orthopedic surgeon who performed your knee replacement or your primary care provider. things can and do go wrong with joint replacements of all types. pieces can break or it's possible for them to become infected. if you experience a fever redness and heat at the joint and continuing pain i'd suggest you seek immediate medical attention. hopefully it will turn out that the pain in your knee is due to a muscle strain or overuse. only a health care provider can diagnose this so you might consider making an appointment soon. best wishes to you!
i've had a knee replacement in 2005. i am experiencing excurating pain in this knee when trying to bend the knee. i also have pain when lifting my leg. could something be wrong with the knee replacement?