I'm so sorry you're having such a rough time, so much pain. I can relate to that. Only my pain wasn't physical. Please, see your doc and tell him exactly how you're feeling. You need to see a pain specialist. And if your doc isn't taking you seriously, after all you're the one that has the pain, get a new doc.
From what I've seen here many of the people are well versed in PN. Many of them have great ideas. This is where I found out about the B-12 that has made such a huge difference in my PN.
My heart goes out to you. I can *really* feel your pain. And not being able to sleep is the worst. That's what drove me to researching so intensely.
Please, get help now! You're a valuable person who's touched many lives even if you're not aware of them all. Don't give up or in. Get help!