Does c5-c6, c6-c7 disc herniation n nerve compression cause headaches/ dizziness?

Would not be unique: Cervical spondylosis can be a trigger for tension headaches and even migraine headaches, and the disc issues can certainly make all of this far clinically worse. Note you list chiropractor, do not allow the neck to be "adjusted", as significant risk of spinal cord damage, and further disc rupture. Make sure that the chiro is well supervised.

Probably not: Although cervical spine problems can be associated with headaches and dizziness, usually these problems originate from the upper cervical segments(c2-5). If you are having arm and/or upper back pain, it is probably the result of these disc herniations. You should know that many patients without symptoms will have c5-7 disc herniations on their MRI which may be a serendipitous finding.