since January, I have been suffering from tingling and contractions in my spine and the muscles of my back, and numbness in my left hand, severe migranes, and lots of other symptoms that the doctor got me hospitalized and did so many tests including a spinal tap.. and they found nothing.. right now I am suffering from a strange things that comes and goes, feels like i am being stinged or like an electric shock in arms, legs and my face and then the pain travel fast to my head that i feel like my brain is shivering, and sometimes there is a rash like in the spot that i feel that sting at, the rash has no color and looks like bubbles under the skin, it really hurts and bothers me.. can anyone help me know what it might be