I Was In A Car Accident 4 Years Ago. I

I was in a car accident 4 years ago. I was told my meniscus disc was torn, but surgery was not needed. I used a knee brace for several months. I was just told to deal with it. Now, I am experiencing pain, almost like that of soreness, behind my left knee. It is not constant, but it is off and on daily. It feels better to keep my knee slightly bent. The discomfort awakens me during the night. I have to sleep with pillow under or between my knees. Could this still be torn meniscus pain? It seems to be different.