Suggest Remedy For Sire And Painful Arm

I've been having some symptoms not sure why... Its mostly on my left side from my head to my leg. Sometimes my left arm feels heavy with a little pain...it feels like it may be sore. My left leg sometimes feels hot or with a warm sensation & as if I may get a cramp. I've been having this pian in the middle of my back feels like a little pressure between my spine & muscle/skin? When I do feel this way I'm usually very tired & lightheaded....could it just be from stress?