abnormal uterine bleeding
"I first started the depo shot about 2 years ago. I switched from the Mirena iud because I bled constantly and sex was often very painful. Before the iud my periods were absolutely terrible with extreme cramping and back pain. For two years I loved life with no periods, no spotting and no pain then I missed a shot. I started again about a month ago and today had very dark maroon/brown spotting? Not sure what that means."