Suggest Treatment For Numbness In The Arms And Tremor

Hi for 6 weeks I have had a feeling of disconnected, especially if driving, in fact so much so that I am not driving until sorted. end of December I was on the motorway and felt I was going to pass out, my arms went nub and I was shaking all of. this also happened about two weeks later, I have been to my GP and he said he thought it was anxiety but I have never had that before, I think its got worse and feel slighty dizzy all the time and a bit nausea though I haven't been sick, I have had a lower back injury from roughly 15 years ago and just before this started my back slipped a disc again and has been causing agony for weeks although I am not sure its related, I also have tw teeth that the fillings fell out of a few months ago and these are getting treated this Wednesday and am not sure that is related because I cant taste a funny taste from them