abnormal uterine bleeding
"New year's eve, I went and got my first birth control shot. I've been on the pill but I'm inconsistent and it didn't do much for me. No side effects, except for one.

No period.

This is a possible side effect, but the website says only 50% of users, and only after a year of use. I was hoping for it, but had resigned myself to waiting until 2016.

Both this month and last month, I could feel "phantom cramps" (mine are in my back) but no blood. No pain. Just a very tiny ache, like what it used to feel like before I started. I'm very happy with it, because it used to be bad enough to keep me in bed all day. I just hope it lasts."