i had my daughter sept 25, 2010. and i had the mirena iud put in. my first period after having it put in was like 3 weeks long. and i started me period again around the same this month. but my period was only a week long. i kno its supposed to be irregular but im really paranoid about getting pregnant and dont have money right now for a test. my breasts hurt and that just started a few days ago but i kno that can be a side effect. please help im so scared!