You want to be careful which chiro you allow to treat your upper neck. The successful treatment will likely be very gentle, not a twist and pop.
I was referred to get an MRI with my head turned to the left and to the right. This will hopefully show any ligament weakness. The big question is how to treat this injury. I just try to avoid antagonizing it and icing it when I do cause it to get inflamed.
www.nucca.org and
www.atlasorthagonal.org are organizations that can direct you to a local chiro. Or the links posted by Jo*mar