I am unable to sleep due to severe pain of up to 8/10 in my left knee which has no physical swelling or injury. I am not an athlete and has not hurt myself physically in anyway. It started years ago but with minimal pain and disturbance but tonight the pain was severe and spreaded to my thigh. Its a sharp gnawing pain that is unrelieved in any position, but is currently slightly relieved by a cooling pad. I want to know if this is serious enough for me to consult a real doctor for the possibility of gout or arthritis, or am I just overreacting? Thank you so much GP.