Is it normal for my upper left side of my back to be hurting? it's been hurting for 3 days now ? the first three days was with headaches too.should i be concerned?

It is not feasible to provide a meaningful opinion without additional history, and physical examination. If the pain interferes with your daily routine, you may take acetaminophen, no more than 3-4 gm/day, no alcohol. Regular aerobic exercise will help by improving muscle strength and flexibility. Start with exercise intensity, as you can tolerate and gradually increase the rigor.