Would you go to the ER with this type of abdominal pain?

ok, so for the past four years or so, i have been having these abdominal pains, they are very sharp, and come and go, the pain does take my breath away but does not usually last more than 30 minutes, but it doesn't stay "normal" for long. the pain is in the upper left quadrant of my abdomen... occasionally the upper right side, the pain shoots through to my back. i have had my gallbladder and appendix removed, so those are out. this episode has been going on for a week, the pain is bearable, but quite uncomfortable at times. is it worth going into the ER?...right now i'd rate my pain at a 3, but when it intensifies i'd rate it at a 7.