What Causes Sharp Pain In Back, Legs And Arms With Muscular Fatigue?

I have stinging in my back, legs and arms muscle fatigue and I am tired all the time.,doctor ran blood accept for liver and pancreas. Protein a little high and colesterol high. Everything was ok. He thinks it is a pinchned nerve in back. Mother died of multiple mylona. Having a con exam done. Don't sleep well. Blood sugar cane up 88. Not Diabetic. Liver triglys 730. I have metabolic syndrome but I have never had pain and stinging like this