Is having a job actually hard work?

I recently got a new job at my local supermarket (IGA) and I was wondering if it actually is hard work? Becase all I really do is stand at registers for 4-7 hours around 3-4 times a week and serve people. I feel guilty for eating more on those days because I feel like it isn't hard work, like exercising for example.

It sounds as if you would have lots of ed-thoughts in your head... (sorry about my bad english, I'm from germany...)
Those bad and guilty feelings show you that you're still ill and you have to fight it! It will get easier to eat more on those days... when those thoughts appear the next time what about asking yourself what you want to achieve? You want to have a life where you don't have to think about your food intake in relation to your workout... and therefor you have to start now
Do it! The worst thing that can happen is that you get healthy