This may be a shot in the dark but have you had your vitamin B6 levels checked? I was diagnosed with peripheral neuropathy about 1 year ago and was not only having tingling/burning in feet and lower legs but also tremors all over (especially noticeable when laying in bed). Fortunately for me, my neurologist tested my vitamin B6 and it was too high. The doctor recommended that I stopped taking all vitamins containing B6 which was only about 25 mg total but it accumulates in some of us with the MTHFR gene mutation. It took about 3 months but I got back to normal with no tremors and no more peripheral neuropathy.