"having read all the reviews here i nearly cancelled my appointment to have mirena fitted, i was terrified not having a high pain threshold. anyway decided to go and have a chat with the doctor first, i took 500mg of naproxen an hour before my appointment. my description of it is this ... to start with it feels just like a smear, then slight stomach cramps (not as bad as my usual period pains) then another bit of cramping then done. i was so shocked at how quick it took and how little it hurt, i really was expecting to be in a lot of pain.....now 2-3 hrs later i&#039;ve got no bleeding and a bit of a dull ache like a period pain. i&#039;m really glad i plucked up the courage to go, it was no where near as bad as i was expecting."