One month ago i had a tachy sinus but later for one month i have been having pain on my left arm and both legs more frequently on the left side there have been couple of occasions where my body jerked just on the left side I did an 2d echo and report came out to be normal I also did a blood test my RBC count was 6.1m and S.G.O.T (AST) was 39 my serum sodium was 133. My feet remain cold all the time. I did a chest x ray which was also normal. I feel weakness all the times and have abdominal cramps.