"so far i&#039;ve had a decent experience with mirena. i had it inserted during my period (on the 2nd day) that was a weird experience. insertion was a breeze, no discomfort. i was nervous after reading all of the reviews.  less than 1 minute  and it was over. i threw on my clothes and i countined on with my day like normal. i&#039;m sure i should&#039;ve waited to habe sex but i didnt. on the 3rd day i had some cramping, since then no cramping. ive never really had much crampong so i went into a little bit of a panic mode and was beginning to doubt my decision. bybthe next day the cramping was gone. mild spotting.  i feel like my sex drive has increased.  i am worried about the weight gain but i plan on staying active and keep a close eye on"