bluebug

HI,

I have a copper IUD and somedays I can feel the string other days its like the string has disapered ,its making me stressed beacuse I keep thinking I have lost it and my doc said that I would know if it came out of my body...So all I can guess is I am being obsessive about checking the strings and thats just what happens in the cycle that the string cannot be felt then can be a few days later..So to make a long story short does anyone elses IUD strings play peek a boo aswell? Thanks