I'm 54 yrs old. I am having a sharp shooting pain that extends from my lower abdomen to my left collar bone. It lasts for a few seconds but it is VERY painful. It used to only happen about 3 times a year but seems to happen weekly now. Today at work I bent over to pick up something and when I stood back up-WOW it hurt. I am scared of a heart attack since it is on the left but my blood pressure is 120/80. What could it be? Thanks for any help as I don't have medical insurance.