lost photo when tryed to send them to tesco photo booth but disappered

how to recover lost photos when they where sent to a tesco photo kiosk but disappeared? they where photo of my husband holding my son when he was stillborn on 19 april 2009 they where the only one taken as we had limted time to spend with him my husband went to get them developed dont know if he choose wrong option(move,copy or print) please help! louise