I am sorry for all the pain you are going through. I know how difficult it is to have pain that others in your life don't understand and the uncertainity it causes.
I have alot of pain too and I can relate to the stabbing, burning description. I explain my pain in my legs as that and feeling like I am plugged into an electrical outlet, as I experience the pain in a pulsating way. Very strange and hard to explain.
I see you are searching for answers and I want to encourage you to keep at it. The Dr don't know everything and I have come to believe you have to be your own researcher and advocate.
I would suggest you look at Lyme disease. The wide range of symptoms of lyme is something I didn't know about until recently, even though several people in my family had lyme. Lyme can be a serious neurological disease that can effect every organ in the body and not just the typical joint related problems most people associate with lyme. The tests for lyme are not good and false negatives are common. The best lab in the country is Igenex in Palo Alto, CA. If you want to be evaluated for lyme you will need to see a Lyme Literate MD (LLMD). Most dr are not knowledgable about lyme and treat with outdated protocols. If you research lyme you will see there is some controversery about this disease.
Just a suggestion to look into. I was dx with MS 7 years ago and with lyme 1 1/2 years ago. I wish I had known about the complexity of lyme years ago as I have many neuro problems that earlier tx may have avoided.
If you want the name of a LLMD closest to you ask on the lyme board. I wish you the best of luck.