Hi. I've been on the depo shot for 18 months. I've never had periods or cramps while on this. 29 days ago I had unprotected sex, and again 10 days ago. Well, the past two days, I've had cramps and some spotting. I took a pregnancy test two days ago, & came back negative. I'm just worried because I've had cravings, cramps, and spotting the past fed days and this is the first time in 18 months that this has happened. I'm due for my next shot July 1st. I'm scared, could I be pregnant?!