Bit tmi but my coil seems like its strings are not very far back, the doctor made a comment about how to feel for them but i didnt need to do anything really as they can be easily reached - is my coil in the right place? How far in (preferably in cm) should my iud strings be? Im scared its in the wrong place or has shifted down with my period which has been fairly light but ongoing for.20 days... thanks in advance x