Depo shot

So I'm on the mirena IUD & I've been struggling to gain weight. I'm 5'3 & weigh 95 lbs. I've heard the Depo shot makes people gain weight so do you guys think it'd help me? I've struggled to gain weight my whole life & I'm really just trying to get people to stop thinking I don't eat or saying I'm gonna get sick because I eat all the time & definitely not trying to lose weight.