the same thing happened to me once too, I ate steak and then started sweating and couldn't focus or think clearly. after a few hours I was ok though. in my case no carbs were involved so i don't...
I've been using a step counter for a while and although it could be inaccurate, it doesn't hurt either. Some days I walk 8+ kms and some days I barely move. It's more of a reminder to eat a little...
Do it
Overeating when you just eat once is very difficult, so it's ideal for weight loss
Just make sure you're getting enough micronutrients (fruit/veggies)