I got my first depo provera shot in March. Ive been non stop bleeding all three months. I finally stopped bleeding may 28, began maybe a couple days later and stopped June 8th. I came back for my second shot June 9. June 20th I had unprotected sex. And then two or three days later I started spotting and then eventually started bleeding harder with cramps. I was really nervous because I never experienced spotting before or had cramps during my first three months on the shot. I stopped bleeding today July 7th. I was wondering if I should worry that this is implantation bleeding or just side effects of the shot.