Neurological symptoms

Over the past several months, I’ve been experiencing ongoing balance problems that started around August, including a positive Romberg test and feeling unstable when I stand or walk. Since December or January, I’ve been getting fluctuating sensory symptoms like pins and needles, numbness in my fingertips and toes, buzzing or “ringing” sensations, warmth, and sharp icy or scratch like pains that fades in and out. I notice these sensations more on my left side, especially in my left leg, where I sometimes feel a constant buzzing or a no-circulation type feeling after moving. I’ve also had sharp, quaking pain while lying down and occasional night cramps lasting about 30 seconds, sometimes in both legs but more often in the left. My brain MRI and B12 levels were normal, and although the sensations move around and change in intensity, they’ve been happening for months. I'm 16m.