You might not like what I have to say, but I have all the above symptoms that you have and in my case, it is caused by past childhood trauma . I' ve seen doctors and had every test under the sun. All kinds of mris and neurological exams. I even run a fever most of the time. My immune system doesn't work right. Some people call it complex ptsd. Anxiety and stress actually cause my body not to heal, cause my brain and nerves to dysfunction, and cause me excrutiating pain. I'm not saying this is true for you, but you said anxiety couldn't cause those symptoms. . . Well it can. Either way your symptoms are very serious and need to be checked out by a dr or probably several. Pain is a sign something is wrong and no one should have to live in such misery.