I can't find my IUD strings like I used to be able to. I used to have no problem finding them, and I got my Skyla placed at the beginning of June. In the past week I noticed that I couldn't find them. I managed to get my finger up far enough to feel the opening of my cervix and I can feel two very short sharp pieces sticking out. Are these the ends of my strings? Should I be concerned that my IUD moved?