Need some advice!

Aurora

So I wanna get on the depo shot. It’d be my first time ever on bc, I wanna get on it to help my period and the pains I get when I’m on my period and to help me gain weight. I’ve always been under weight and could never gain weight, Buttt it only lasts three months and in three months I leave to this academy for 6 months, and we have to stay there, I wouldn’t be able to get the on the shot again till I come back. I was thinking I could get on the shot now and then get on the pill for while I’m there I’d be able to take them but idkkk it’s still the same isn’t it? What should I do?? 😩