Two days ago, i started to feel back pains on my left after waking up but it soon disappeared when i became so busy that day..But during that late afternoon the pain returned and it was hard for me to get enough sleep that night because of the discomfort.. The n ext day, the pain was more intense, spreading to my left shoulder down to my arm and until now the pain still exists on and off.. I took over the counter medication to alleviate the pain but it did not work..Does the p-ain and discomfort has something to do with my nerves or arthritis? I need your advice, please..Thanks!