IUD is very much effective in preventing unwanted pregnancy
with failure rate less than 1%.
Pain around pelvic region may be due to some sort of infection/PID associated with insertion of MIRENA.Do a pelvic USG with some hormone test & blood for TC/DC/ESR
and a urine test for R/E,M/E to rule out underlying pathology. Also need some clinical examination.
Check tail end of thread to make sure that MIRENA is properly placed and not displaced.
Use some anti spasmodic medicine like Tab DROTIN
DS to get some relief.
,take healthy diet,control body wt and need proper sleep. Drink lots of fluid.