I got the mirena June 29th after having my son and since then I've had cramping for about a month and a half, after that it's gone away but I've had some pretty heavy "periods" but they're really irregular and sometimes feel like they last two weeks and even when I'm not on my period a lot of the time when I go to the bathroom there's a little blood when I wipe. Has anyone else had this problem? Is it normal?