I'm 24 years old male, height 5.7" and weight 62 kgs, from last month I'm doing exercise for about 30 mins a day, from last 1 week I'm getting sharp pain exactly at the middle of spine bone when I do push ups, and also I will get that pain when I suddenly sit on chair, it is like a sharp needle like pain n I feel burning sensation, I stopped doing exercise, 2 years back I have gone through 2 abdominal surgeries ie; appendix n umbilical discharge, during this doctors have given anesthesia through injection to spine bone, please help me out, I'm worried about this.