So picture this.. I lay on my left side, body pillow between my knees, small pillow behind my back, and I regularly switch sides in the middle of the night. But once a night usually, sometimes more, my left leg gets numb. Not like it fell asleep. It's like a sore numb.. What is this? I am 19+4. It wakes me up every time and I have to move positions. Wakes hubby up every time I move.