OH no...
IF you feel the IUD in your cervix, it sometimes means that the actual IUD has expelled, NOT that you are pregnant!!
I am 26, and I work in the medical field.
I DID get pregnant with my last IUD, but simply had an abortion, and then had another IUD inserted.
IF you happened to get pregnant, which is VERY VERY RARE, you could have an abortion if you TRULY do not want any more children.
ALTHOUGH I am not much older than you, I have a full college education, and work in womens health care.
IUD's are something that I love to talk to women about, because they are so effective.
MY Getting pregnant on an IUD was a rarity, and I have not been pregnant since.