No worries, that weight shouldn't stick. It's mostly a combo of water weight (for lots of people, cheat meals usually include processed foods, after all, which are sodium-laden) and the weight of the food itself, since it hasn't been completely eliminated yet (yeah, poop
does weight something

). Don't beat yourself up about it. Given the time, you'll anyway 'learn' what you can eat without overeating on your 'cheat meals', what you need to avoid, etc.