"i&#039;m 29 years old and just had my 4th child. i got it inserted 7 weeks after having my 4th child. insertion didn&#039;t hurt, just a little cramping. i felt dizzy for the 1st 20 minutes. went to work and had light spotting. now on my 4th day with the mirena and i still have light cramping and spotting is now turning into regular bleeding. so far so good!"