Just tingling and numbness is initial symptom of gbs, but definitely based on that one symptom u cannot categorise yourself as a gbs patient. By and large NCS / NCV is abnormal in gbs. Tingling and numbness can be due to other simple
vitamin deficiency aslo . Can be due to b1 and B 12 deficiencies. So based on only one symptom we cannot confirm gbs. I hope you have got clarity on this issue. Thank you