How Can Neck, Back And Shoulder Spasms With Joints Jamming Be Treated?

I was in a car accident 2 jan 2011 i was doing 110KM and hit on the passangers side, at the time of accident i was fine but a few hours later i was surrering back pain following day i had neck ,left shoulder middle and lower back pain, pins & needles down my left hand, xrays came back clear no fractors, i'm booked in for a mri this week, i started physio last week but felt very sick & ligh headed just after finishing the physio sessio, i was told by doc that neck back & shoulder was in spasm, the physio said all joints were jammed apart from 3 in my back. i told physio how i felt after 1st session and he cant understand why as he never worked on my neck only lower back. why am i feeling worse now should i be worried,