hi i had just the other night a sharp pain between bottom of rib cage and upper hip it took my breath away for a few seconds only happened once and i now today have noticed a slight pressure on left flank toward belly button along with very minute dull ache and sometimes my back on that side hurts when i a take a dep breath. I have had bad bouts of constipation and taking stool softners for three days now i feel the pressure mostly and the ache when standing or sitting what could it be i thought it was a nerve dying but the dull pain is from hip to ribs and to belly button and sometimes along that side of back on left side but mostly preasure.