I am in a physical therapy class for pain on my shoulders, recently after one session I have experienced pain in my neck. I thought it was a mild strain but it has continued now for 6 days. It began on the left side now it is at the base of my neck in the rear. I can t lift my head as the pain is there, I have taken pain killers (left over from an earlier diagnosis in my joints last year), it helps but I think that this is too long. Any suggestions?