Painful Jabbing On Lower Right Side Of The Body

On Sunday night I noticed this really sharp localized pain that would occur when I coughed on the lower right side of my abdomen right south of my navel. The pain itself doesn't feel gastric, instead it feels like the muscle is strained or like there is a bruise in the area. At first the pain only occurred when would cough, but now sudden movements hurt too, and the pain is from my lower abdomen up to the the bottom rib on my rib cage and feels like I have a big bruise in the area. The pain has been lurching to the right and the area is tender to the touch, but it is also fairly mild. I don't have any more symptoms; no fever, no loss of appetite, no nausea, and I really haven't engaged in any activities to bring this on. I was just wondering if I should be concerned about this due to it's sudden nature and the area of pain.