I have a few symptoms that make it hard for a proper diagnonis - constant neck pain, shoulder to elbow pain, lots of numbness in neck, shoulders & blades & arms. Ringing in ears, especially the right ear, dizziness, blurred vision, headaches. I also have PVC's and Afib. I have been researching these sysmptons and the words schwannoma tumor came up a few times. Any thoughts on this?