I have a lump on the right side of my abdomen. It's just below my ribs. When I lay on my left side I can feel it and move it. It will move all the way over to my bellybutton. I don't have any pain, but when my fiance pushes on it just right it makes me jump. It's a wierd feeling but it doesn't necessarily hurt, it's hard to describe. Is this something I should be worried about?