Do you have a "period" on the injection (Depo-Prevera)?

[Doodle.]

Most girls I know on the injection have stopped having periods (well, a fake period I suppose). I had my first injection about 2 weeks ago. I'm just wondering if my periods are likely to stop or not.

[CorrieUSMC]

My wife's first Birth Control method was the "shot". After she first took it she stopped having periods all together for about 8 months straight. Then she would have weird cycles of about 3-4 weeks straight of having a period then another 4-6 months of not having one. Then again, 3-4 weeks of having a period and repeat.

[Coffee.]

My sister stopped having periods within three months.

[Doodle.]

Sweeeet I'm actually having mild cramps right now (which I get about a week before my period) I hope I don't have one >.>

Since I was on the pill before I had the injection would that affect me having a period?