Did it's stomach just one day seem bloated or was this over a period of time? If I put food in my tank the CLs will eat it all and look extremely bloated. I am careful to not over feed these guys as mine will readily over eat. I can't tell from the pic but is it's eyes bugging out? Does it skin have any red streaks as if it has small tears?
As far as the CL laying on its side that can be normal. My CLs like to lay on top of the power-head one right on top of the other just crammed up there.