should i be concerned?

so just for some context, i’ve had my copper iud since july. i started my period on the 30th, ended on the 4th this month. around the 6th i did a self-check because i had felt poking while trying to sleep but noticed my strings were at the entrance of my vagina. i noticed a little bit of blood but it looked like old period blood so i kinda shook it off and continued checking periodically the rest of the week. only today i’ve experienced bad cramps but i am also pooping like crazy. i’m so sorry for the tmi 😭 i checked my strings earlier and i still feel them but they’ve went back up like maybe 2-4ins. my uterus is kinda hard but not plasticity like the iud would feel like??

anyways, i’ve read that it shifts with our cycles since our uterus’ move around and whatnot & i’m scheduling my checkup on thursday this following week since my schedule is so tight. mostly im just wondering if anyone else experienced this before and what the outcome was if you went to the doctors? 😭