Is my IUD out of place?

I got an IUD a week ago and have been having really bad cramps, almost unbearable. I checked the string length and I think it got longer and I started bleeding similar to a light period and the cramps got worse. Some parts of the day I feel completely fine, other parts I’m in a ton of pain. I’m supposed to start my period right now, but I don’t think it is my period. Should I go and get my IUD checked? Is it possible it moved or perforated my uterus?