My clavicle and shoulder is popping, what could be the cause?

I was in a rear end accident 3 months ago. I was stopped and hit by someone traveling 50 mph. I was diagnosed with whiplash and did PT and cervical traction. None of which helped. My Dr. sent me to a mage therapist and the mage is giving some relief but my muscles continue to tighten and spasm. When I go to undress or reach across my body my shoulder is popping and crackling and yesterday during my mage my clavicle popped. I am in severe pain and nothing is helping. The pain is interfering with my daily activities.