Constant, sharp pain in stomach area above the belly button.

I was out walking for 40 minutes yesterday and when I sat down I experienced an extremely sharp pain. This pain was very different from my "normal" healing pains I've been feeling all week and located in a different place. The healing pains I've been feeling prior to this were cramp like and to the lower left of my belly button but now it is a constant, sharp pain in stomach area above the belly button. It's been present now for 12 hours consistently only to show some relief if I am leaned back in a recliner but gets sharp and stabby again as soon as I'm in an seated upright position.

My surgeon and her assistant physician are both away at a conference until Monday and the bariatric center here doesn't open for another hour to call them. I'll probably go to the E.R. since constant, sharp pains probably aren't normal but beforehand I just wanted to seek out information on here in case this has happened to anyone else and offer it as a suggestion to the E.R. doctors.