This may be long but i'm in need of help. I was put on depo provera and had my first shot on August 1st, 2016. I was due for my second shot on november 1st, 2016. I didn't get the second shot because i didn't like the side effects. It did completely stop my periods. However, i finally got my period back on february 1st and lasted until about the 6th. I was due for my next period on march 1st but never got it. I took a pregnancy test on the 9th of march and it was negative (no faint or evap line) However, i've been having lower back pain and severe cramps that come and go. The cramps are so bad that i have to use a heating pad and can't get up or hardly move. They stay for about 10 minutes then go away and then. one back. The lower back pain has been consistent though. Not sure if i should go to the ER or not. It's starting to effect my sleep.