IUD falling out

Marisela

So I got my IUD at 7 weeks pp I went today 11weekd pp to check on the string and she didn’t see it or feel it . She said it could curl up which is normal or fell out !!! 😳 lucky I am in my period so I am not pregnant. Has this ever happens to anyone. Am going tomorrow for an ultrasound. If it fell I did notice I was still bleeding when I got inserted