IUD question/problem?

[fianna.livejournal.com]

OK, so I have almost had my copper IUD for a month now and it is coming up on the time I would have my period again. For the last couple of days I have been getting VERY painful cramps but no bleeding yet. Just some brown spotting that comes and goes. Tonight I still see no blood but the cramps are incredibly painful. They hurt to the point where it almost makes me want to throw up ( and i almost never throw up) and I can barely move. I took some Ibprofen (sorry for the spelling there) and am using a hot water bottle but these SUCK.

Is this something that should worry me? I know it is supposed to make your periods more painful but this is WAY more painful than anything I am used to and I am used to heavy cramping during my period. Has anyone else who has the copper IUD experienced this?