Hi, I m 31 weeks pregnant. I normally (pre pregnancy) sleep on my back, but now have been sleeping on my right side. I woke up 4 days ago with my shoulder and arm completely numb. The numbness is still there although much less, but I have a feeling of heaviness down my arm that won t go away, along with decreased grip. I do not have pain, although it s a weird numb, heavy, feeling that starts at my armpit and goes down my arm to my hand. I now have been sleeping on my left side, and woke up this morning with my right thumb, index, and middle finger, completely numb with the prickly sensation. It went away after getting out of bed and walking around for 10 minutes. Any idea which nerve is creating these symptoms? Any help would be appreciated.