I have burning/numbess that started in my right foot about a week ago. Since then, I have had it run into my leg, as well as noticing it in my buttocks. Around that time, my lower back was hurting tremendously for no apparent reason. Yesterday, my back began hurting below my ribcage on the right side where my kidneys are. Today, I still have the back pain, but my foot is extremely cold, & continues to get colder to the touch, when it didnt feel cold on the outside last week. Any thoughts on should I go to dr or emergency room? I have read about Neuropathy & Blood Clots, & Nerve Damage...kindof concerned.