IUD Trouble

Hi everyone, I got my Paragard placed about 4 days ago, was very painful and had minor cramps and bleeding that lasted about 2 days but after that, everything was fine. I noticed today that something at the entrance of my vagina was poking me so I checked it out, and it was one of the strings hanging down that low. I felt further up and there's no sign the IUD has been expelled-can't feel it at all. Has this happened to anyone else? I'm hoping that my doctor just didn't cut them short enough.