Sharp knee pain!. i've had this problem for months , but my right knee is painful at the top, when i bend it and stretch it back out omg i want to cry?

Internal derangement: An internal derangement of the knee can include many knee structures. Most commonly can be a torn meniscus. In the knees you can also have joint mice, you can have torn ligaments, you can have slippage, you evaluation will look into each of these issues.

Medical COnsult: See an orthopedic surgeon (they do more than surgery) to determine the cause of this pain. They will likely examine you physically, then order xrays or MRI based on their findings. Only then can you really know what is causing the pain, and find a treatment path.

Many possibilities: Your pain could be as a result of many different things. A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. Causes of pain may include: trauma (fracture, tendon or ligamentous tear, arthritis), infection, metabolic conditions (gout), musculoskeletal or biomechanical abnormalities.