Hi welcome to Health care magic forum.
Thanks for calling H.C.M.F.
As you describe it appears to be some thing concerned with the gynic problem, as you said it could be due to I.U.D of contraception
, or an infection.
It also can be due to renal colic
related to kidney
stones,or urinary tract infection
, or anaemia
. First thing you have to do is get the I.U.D.removed.
I advise you to consult a gynacologist for diagnosis and treatment. You may have to get the M.R.I. besides other routine tests for confermation.
Wishing for a quick recovery.