I have post concussion and got the concussion January 25th, a lot of my symptoms have susided but yesterday I felt I Was ready to do some exercising.  I did a fast walk on a treadmill for about a mile and a half, but than when I went to bed my right temple area started to act up in pain, along with pain behind my right ear, and it went into my neck which became real stiff and sore all the way up to my skull on the back of my head. My question is did I cause more problems with the mile and a half walk while I am still healing from the concussion and should I be concerned?