Liletta IUD placed about 1-2 weeks ago

And I'm cramping HARD.
I have a follow up Tuesday but there are times I need to sit on the ground no matter where I am just to move on. I've also been bleeding since it's been placed (tmi- at least there are no pics lol).
Is it because I had a baby or something? Is it just because it's my first IUD?
Idk what to expect or anything.
Try not to freak me out too badly. I have severe anxiety and my mind is already in the worst place.