Depo weight gain??

Aryanna • Cali Girl 💗
Has anyone not gained weight on depo?? I'm currently on the depo shot and my stomach is looking a bit chunky.. which I guess would make sense since I'm not working out as much... 
But what is the weight gain from?? If I work out everyday will I be able to build muscle and have a flat stomach? Or will I just gain fat..?