A psychiatrist can order labs, but the only specialty he or she has is dispensing medication for those suffering from mental disorders. That's it. While some do therapy, they're not even all that well-versed in psychology, as the time they spend studying it in a formal setting is quite limited compared to psychologists, who only study that and for many years. Your psychiatrist was right in sending you to someone who spends their time on backs and what might be nerve pain. Unless you eliminate the possibility of a physiological cause, nobody can ever say for certain there isn't one. What you're describing does sound more like a mental thing, because one would wonder why you wouldn't feel this sensation at some other time if it was from a bad back or nerve pain. I would ask, as many meds can cause electrical jolt sensations including antidepressants and stopping using antidepressants or other drugs that affect serotonin, were you taking any drugs like that before this started? Had you stopped any? But usually people report those sensations in the brain, not the back. Did anything happen about that time, such as a fall or an injury or lifting something heavy? Did anything happen at that time that affected you emotionally to the extent something like this would happen? Sleep meds can cause people to feel drowsy even after sleep -- it's on the insert that comes with the drugs. I'd take your psychiatrist's advice and see someone who does specialize in back and nerve pain and see if there's anything there, just to see. Sounds like your doc is trying to help. But meds can be as hard as the illness on some people, your doc can't change that.
Gosh Badshadow, I'm sorry you've been having this difficult time. I know first hand how sleep can impact us. I had a period in my life in which I slept about half of what I needed to most nights of the week and I had cognitive difficulty. You almost feel like you are in a dream! I am really sorry this has been the case. I know doctors do use Seroquel for the side effect it has of drowsiness but when it is used strictly for that, it can have other side effects. Which is unfortunate because you just want to sleep. Are you sure that it was just sleep they prescribed it for and you don't have any other reason to need an antipsychotic medication? Have any other medications been tried such as ambien? Tazodone? Ideally, you wouldn't need any medication but it sounds like that is not going to be the case at this point.
It's worth noting sleep hygiene as well. Caffeine is a trap. The highs and lows associated with it ultimately cause issues so if you can ditch caffeine all together, it is best. Cool, dark place to sleep. Nothing alerting before bedtime. Eat and drink minimally at night. Etc. I'm sure you've tried all of this but thought I'd mention it any way. I also found that when I exercise earlier in the day, I sleep better at night.
Do you take any medication for anxiety?