New with Mirena

Hi everyone-

I just had Mirena inserted Monday and am feeling lower abdominal cramping and very lazy. I am nervous its not in right or if its not for me and I should take it out. Is it just too soon and I am suppose to feel this way right now? Aleve isnt helping and the dr. gave me some pain med. to take for a couple days to see if it helps. Every time i sit down I feel better but when I get up I have bad pains. I also feel very full and bloated which is totally unusual for me.
thanks-