Pain has been coming and going for at least a month...but increasing with intensity...today the worst...I flinch when it first comes...it starts along middle of right side extending towards back and towards center belly. I also have IBS, and feel much worse after eating. Today I even felt nausiated but that is feeling a little less. Very bloated. Feel very gasy and some headache...stabbing pain happens between the sharper pinching/stabbing bouts of pain. Right side of abdomen feels much harder and has more of a protrusion than left side. Pain is the worst I have had it. I am 63 and have no apendex from earlier surgery years ago.