Re: I think i felt an egg!
An egg feels like a hard, egg shaped area in the side of the gecko just under the rib cage (and it is free moving, not connected to anything but doesn't move around very much). Usually by the time you can feel them they are about full size though and pretty much fill the vertical area in the side between the rib cage and the pelvis.
What you felt sounds kind of small--it might have just been some calcified waste as you can sometimes feel small bits of that in the stomach area. Was it in the side below the rib cage, or more toward the middle of the belly? If it causes your gecko to bark it is probably uncomfortable, so be careful not to palpate too hard.