I have had excruciating right inner knee pain since last wednesday. I have been limping and its painful walking and using the stairs. Would I have to alter tylenol (acetaminophen) and ibuprofen?

Trauma? Prior surgery?Swelling? Fever? Med hx? Too many posibilities. Need an evaluation with xrays.
Check it out. Certainly needs evaluation for trauma, fracture, tears, infection .... Etc.
See details. Medial knee pain has. Several causes. It would be important to know if the knee is swollen or there is local tenderness to the touch. If any event, pain this severe needs to be evaluated. An orthopedist would be a good choice.
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.