Feel super fat but I haven't ate anything?

So I've noticed in the past couple of days that my stomach is sticking further out and I didn't have any self confidence in the beginning and this is making me feel horrible. I'm a chubby, big girl and I work out everyday and I eat healthy. At first it seemed as though my stomach went down and that was last week, but right now it's huge. the only thing I've eaten is a sandwhich from Jimmy johns. And I'm pretty sure I'm not bloated. I'm definetly not hungry either. WHAT'S UP WITH THIS?!?! :(