Upper Left Pain Dull Aching Pain In Upper Left Arm And Neck?

Dull aching pain in upper left arm and neck? - upper left pain

I am 22 years old, no heart problems before. Heart disease runs in my family. In the last few hours I had a dull pain in the left upper arm on my shoulder and neck. No chest pain or heartburn. What is fever? In addition, there were no injuries or pulls ... Who knows what could that be?