You mentioned you did a show. This is the main reason. You went from eating clean to what sounds like over eating. This is the fault of your diet. I'm not in the market of bashing coaches, but he should have addressed this through nutrition. Edema can get really bad post contest, espcially if you dieted hard and espeically if you manipulated water and sodium. The answer is to go back to dieting. Not dieting like you are dieting for a show, but cutting some of these cals, getting rid of the cheat meals and drinking plenty of water. A mild diuretic may be in order if all of these other things are adressed first. But you need to get that other stuff under control first. 100% sure this is the cause