IUD strings

Kelsi
I cannot feel my IUD strings and random pains from my uterus keep happening now and then. I just got off my period and sometimes my cycle throws off whether or not I can feel the strings but I fingered really high up and felt nothing. Could it be dislodged and could that cause infertility? I'm terrified it maybe in my uterus and that I won't be able to have kids one day 😭