Notice how you sleep
if you do not sleep in a relaxed position, or your arms are under / above your head while you sleep
they can go numb - and whilst they are coming back to feeling, you can feel this pain
if its constant, it may cause strain on muscles
this pain could also be caused by you lifting something too heavy, muscle spasm or what not
best thing to do, if you're worried is to go to a doctor
I myself also get strange pains in my chest as you describe, i dont smoke, and doc says i'm having psychosomatic episodes - or his words "i'm imagining it"
so if the doctor tells you that, and you're still worried make sure to get second opinion.
good luck
