Dear Janette, your problems are probably not related to your kidneys. The back pain
is probably related to the IUD. Unless you have a simple blood and urine test i wont be able to absolutely rule out any kidney issues, but I feel its unlikely. With regards to the swelling in your vagina, its not my specialty and you best ask this question to a gynecologist. Re-post the question in women's health section/ gynecology section. Best wishes.