"i was on the shot my first in december of &#039;13, next was due in march &#039;14. barely had a period but when i did it would last 15 days straight then i switched to the pill and since i&#039;ve taken it i&#039;ve had a period non stop. before any birth control my period would last 3 days. i stopped taking birth control all together it caused back pain, cramps, headaches. it was supposed to help cysts but i&#039;d rather go through that pain then with this."