I got my very first depo shot on February 23 2015. Everything was great until the 19th of March 2015. I was under alot of stress with the possibility of a break up. The 19th I started spotting just a little. The next day it started to get heavy and the cramps were horrible. A week later, I am still bleeding and I am very unsatisfied with the shot. I read online that I could be bleeding old blood for months. So I am thinking, what is the point of being on the shot if all I am going to be doing is bleeding and cramping. I've been feeling horrible since I started the shot. Can anyone tell me how long the shot will be out of my system and what are the side effects?