Hi, I pulled my back about a week ago. The pain didn t last long and I had no probelms until yesterday evening. I simply went to transition from a sitting position to a laying position and experienced a severe stabbing sensation in my middle to lower back, followed by shaking. The pain lasted for about 30 secs. My wife helped me to sit-up, but then I had two more bouts of severe stabbing pain in my back. The shaking was severe and lasted for about 10 mins. I haven t experienced the shaking before. Is this a sign of a more severe problem than a pulled back?