What can cause a stiff neck , with terrible pain, pain behind the ear, nausea , vertigo and fever all on the left side of my head. I had an inner ear infection 2 weeks ago. But, the pain in my neck and behind my ear will not go away. I have an immune difenciency and have had a viral infection going on 6 weeks. I have had c-diff 6 times, so a rochephren shot is all they can give me.