String too short?

Sophie
My uterus is tilted slightly to the left due to a birth defect (I won't go into that now) and my IUD seems to have shifted so that one of the strings is barely poking out and the other one feels normal. If I can still feel one of the strings is there any reason to be concerned?
I'm also feeling mild discomfort to the left but it could be shifting IUD or bloating. What's it likely to be?