R.L.
Girl, mine killed from the time I got it in until 2 weeks later, then for about 2 weeks around each period. Told my GYN, she told me to "give it more time to get used to my body." Had it for a year. Got that sucker yanked out and haven't looked back. Good luck.
ETA: I agree that it does depend on if you've had kids..I hadn't had any kids when I got my IUD in, so my GYN warned me that it would be a bit more difficult since everything was still "tightly packed in." :)