I'm so confused!

Recently I pulled a muscle at work. I went to local doc because pain did not go away. She sent me to physical theropy. After several visits I started getting sharp pains from my left shoulder down my left arm. So pt wants me to go back to NS. She trys to contact my doctor to set it all up. The pain got so bad I went to ER. They did a MRI of neck and said he didnt see any nerve damage. Sent me home with meds. So my doc calls next day and wants me to go to a bone doc instead of NS.

As anyone had this problem before? Not sure if its Chiari related or not. Kinda scared to go to a bone doc.