I have had a IUD for almost 2 years with no problems at all. Then all of a sudden this month I could no longer feel the string. I went to my Dr. and she said I don't know where it is, she was really no help at all. So I went for a ultrasound and they were just as un-helpful. They said they can't see it, they don't think. One thing I know for sure is that it did not fall out. Has anyone ever had a problem with not being able to find the string and if so what did you do about it. Any help please, this is driving me crazy.