Depo Shot

Eden
So Monday I got the depo shot for the first time and every day since then I have constantly been hungry. I will eat and not be 100% full and then start to feel hungry shortly after. I haven't given in to this hunger and I plan on getting some healthy snacks so I don't eat a bunch of trash throughout the day... and so I can actually focus in school without starving. 
I know that this is normal and everything, I just don't want to gain weight. Has anyone else experienced this and have you gained weight? How have you dealt with it?