I am a 39 year old woman, 5'1 and 110 pounds. I do not have any medical issues that I know of. I exercise and try to eat right. I woke up three days ago with my neck hurting. My left side of my neck/shoulder hurts and my left hand goes numb/tingling sometimes. I've been burping like crazy. I don't feel chest pains and I can breathe normal. I'm not tired nor do I have stomach problems. What could this be?