Your narration about your head injury is not complete. I am assuming that you have unilateral complaints of pins and needle sensation along with slipping on right side. Then it can be related to head injury on left side of brain around motor and sensory cortex. However if you have pins and needle sensation in all limbs then you have to be evaluated for causes of peripheral neuropathy like diabetes, renal function, nerve conduction study, immune profile. Hope you recover early.