If you're serious about it staying with you for that long, I would definitely go see a doctor. I wonder if it could be a symptom of some other unknown nervous system disfunction.

One of my best friends would always loose feeling in his legs when he got drunk. We thought it was funny until he went to the doctor and they told him he had M.S.

Were you taking any medication? Did you pound some B vitamins before? Pay attention if it happens again.