"got the mirena in almost 2 weeks ago, and i must say i love it so far! horrible cramps for the first 5 or so hours after insertion (had to drive home) and almost couldn&#039;t take it. heating pad helped bunches along with laying on my back. the cramps went away the next day! i even went to work. a few cramps here and there, but that&#039;s expected. nothing too unbearable. i&#039;m also a 21yo with no kids. my boyfriend also can&#039;t feel it. one thing though, the antibiotics they put you on day of insertion did give me a yeast infection. went away a couple days later. love the mirena so far!"