She loooks a bit overweight but keep in mind, aslong a you know for sure its a femal, she also could be full of eggs. Female toad tends to get real big once they are full of eggs and if you don't have a male, not much you can do. She will reabsorb all the eggs eventually.

Toad bloat themselves right up when handled too. Defense mechanism. My to tiny toads almost double in size when i handle them. Make themselves look huge! Lol

How much do you feed her? And what kind of toad is she?