Yeah, this seems like one of those things where people casually discussing the issue are talking about wildly different scales. I, to be clear, am talking about having a hangover or sleeping in a rough position and pinching my neck once in maybe two or three months and refusing to take an analgesic to get through it faster. I get the feeling that what you're describing is either on a way different level or a rarer interaction or side effect.
Which is why my other comment below still goes: if you need to deal with pain beyond sporadic usage to get through a one-off event, please go talk to a doctor and don't listen to me or anybody else on the Internet.