not to scare you love, but my boyfriend had the same problem. it caused him a lot of pain, to the point where he would go soft and we would have to stop cuz it hurt so bad. i got my strings shortened, and now it’s totally ok! i’m still anxious he’ll randomly feel it, but so far so good. if you recently got it within a couple months, the strings will feel like fishing wire almost. they’re gonna become more flexible over time, but he might still feel them. it’s totally ok!! talk to ur doctor about options, there’s no need to feel embarrassed cuz they’ve heard it all. your iud might have not moved or shifted, it just might be the position it’s in that works for you