Ever since last night at around 2200 my left foot has felt numb as if it were asleep. From my knee down it also feels numb with a achy feel to it and it feels stiff. Not sure if this is related, but for 4 days straight now I have had a major pain on the back of my head, only on the left side as well. The pain comes and goes but when it hits it feels like a throbbing feeling. I have tried asprin and to get up and walk around but nothing seems to work.