I've had neck surgery C5 Fusion due to disc displacement / damage. I have to get my C4 & C6 fixed soon.
My symptoms- stiff neck, migraines, tingling fingers, numbness on one side, sharp or stabbing pain.
After your cardio dismisses your symptoms please go to a neuro Dr. Don't recommend a chiropractor as if you have disc issue it could get worse. I would recommend a massage on your shoulders and neck area before a Chiro.
You could ask your GP Dr. to prescribe something for the pain until you see a Neuro Dr.
Good Luck!