so I've been on contraceptives(a two month injection) then went off it in November '11. I had a period within that month but nothing since then.

Ive been experiencing slight discomfort in my lower back/left hip area... I have no symptoms of pregnancy. Except the 'No Period' factor. I have some abdominal cramps and feel a bit heavy as if my period is on its way. But nothing yet... I must admit im a bit worried.

Do you think there could be a possibility of me being pregnant?