Bad Cramps

I got my mirena iud 2 weeks ago and about a week ago I started getting really bad cramps to where I have to curl up into a ball and hold my stomach to make them stop they get so bad I sometimes get them while driving and I have to stop until they pass I’ve also been spotting much more with some clumps and it gets semi heavy sometimes but I can still feel my string

Is this normal as the adjustment cramps in the first 3-6 months of having it? Or should I go to my dr