If you can pop your neck, it would not be unlikely that you have additional neck issues that the popping does not resolve. The upper neck does not pop, even when it is out of place. I suggest you find someone who is a specialist in upper neck, an upper cervical chiro or Physical Therapist who has good upper neck skills or maybe an osteopath (doctor with DO after his/her name) to gently help you heal.

You need to take an break from popping your neck to let it heal. You will also need to establish good head and neck posture during sleep and rest. You can easily undo any good done by a doc or PT by popping your neck or sleeping with poor posture. I spent many nights sleeping in a recliner. I got my best sleep that way.