"chose skyla over mirena because less hormones and smaller in size. insertion hurt soooooo badly, and i&#039;m not sure having the iud is worth it anymore. i&#039;ve been on my &#039;period&#039; for 3 weeks now, bleeding nonstop. ever since i&#039;ve had the iud inserted, my periods have become so irregular and long. in terms of birth control, it is effective. but nonstop bleeding isn&#039;t worth it."