It actually sounds like you may have Fibromyalgia. Neck pains, headaches, muscle aches that move around the body, lousy sleep and a very irritable bladder are all symptoms. So are sleep disorders, particularly 3 kinds of them, one of which is very particular to this illness and is called alpha-delta sleep anomaly or alpha- delta sleep intrusion.....
One of the symptoms of the prolonged sleep disruption it causes is something called hypnogogic hallucinations, which are mostly sudden noises just as you are drifting off but not quite asleep, or they may occur as you wake up. The most common ones reported to me when I used to run a Fibro support group for 3 cities were the sound of a wire shorting out, the sound of a slamming door, and a loud bang. I had the slamming door one, and it was so convincing that I would prowl though the house checking for intruders.
They key here would be whether you have pains in all four quadrants of the body, not just the neck. A diagnosis of fibromyalgia requires symmetrical pains at certain exact points in all four quadrants, though they do not have to be equally as bad on both sides. You might want to get checked by a Rheumatologist to rule this out if you meet this criteria. You can look up the many other symptoms online and see if it fits.
I am anticipating what may be your next question, and no, I've known plenty of clueless people with fibromyalgia who were definitely not empaths at all. While some with fibromyalgia are definitely more sensitive, and I've read that some Indian tribes consider all fibromyalgia people to be automatic Shamen, I knew too many people who had it who were not emotionally sensitive at all, and so consider the increase in sensitivity among some people to be part of the overactive sympathetic branch of the autonomic nervous system in fibromyalgia, a physical reason for hypersensitivity of all types.
I will say this, and this is just my observation from 10 yrs. of having running a support group and 4 yrs. running a call in info line, so it's not scientific.....I did see what appeared to be a correlation between how severe the fibromyalgia was and the sensitivity of the person, with more sensitive people being much worse afflicted by the other symptoms of the disorder. I was told I was in the bottom 10% in terms of severity, for example.
This may be a chicken and egg illness, ie. which came first, the physical symptoms or the sensitivity? In my case, it was definitely sensitivity, from birth. We do know there are mutated detoxification genes involved. What I think matters, and why I wanted to post to you, is that if you have the diagnosis, there are treatments that will help besides just metaphysical ones, or harsh drugs, and the ones I think work best are natural and safe when properly used, so I think it's worth knowing if you fit the diagnosis for that reason. Just my two cents.