Hello thewakingof,
Pretty significant first post eh?
I’m certain we all have an appreciation for the nature of your concern.
Let me reply in the following way.
The neck is not a ball and socket joint and therefore it should not be rolled around. However it can be safely moved around in the practice of asana (this is, after all a Yoga forum) on the three axes - front and back (nod), side to side (ear to shoulder), right to left (look left/right).
Some students certainly DO pinch the cervical spine (neck) in such an action and while that is not an aligned nor wholesome action (in asana) it’s rarely damaging unless the doing is incredibly aggressive, done over time with that aggression, with no awareness, in an unhealthy body or with a less-than healthy neck.
Continuing to speak generally (since you are not in front of me, not my student, and not doing the doing) a brief period of doing (assuming it isn’t an extreme doing like balancing on your nose) likely will do less harm than the thought of being harmed will. What the mind can perceive and believe it can achieve.
When the head if tipped back in the practice of asana there certainly are some ways to do it safely and some ways to do it other than safely. Yoga teachers are supposed to convey the former and prevent the latter, when possible - though students are often sentient beings and do as they please:-)
If you are very concerned about damage AND seeing a health care professional will alleviate rather than exacerbate your concern, then go. Anything is possible but it’s less likely you’ve incurred the damage you outline in a brief, one-time doing.