IUD infection?

Can iud insertion cause infection? Like wtf! I didn't even know that. I got my iud yesterday and I just found out it can cause an infection. That's insane. Now I'm worried I'll go septic or something, I don't even know what symptoms to watch for. I've had three IUDs this is my fourth and I've never had or heard of infections from it. I'm freakkking the hell out