IUD: Just got put in yesterday!

It was very painful during insertion, my problem is it (by it I mean my entire lower body) is cramping & hurts. I'm not used to serious cramping longer than a day. 
Now it's the second night and I'm still hurting pretty bad. It hurts when I move, don't move, & sometimes eat. I'm too afraid to touch inside me. I'm having trouble eating because of the pain. Is this much intense pain normal? How much longer before it goes away? 
Side Note: I do see my doctor next week to have an untrasound to make sure the IUD is in the proper spot. 

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