Copper
"I have thyroid problems so the hormones I was getting from the pill weren't working with everything else. Ive had the IUD (copper) for about 5 months now and its not my favorite but not horrible. I never got cramps on the pill and my periods lasted roughly 3 days. With the IUD Ive had only two periods lasting 7-12 days which have been super heavy with horrible cramps and nausea. The insertion was horrific. I took ibuprofen before and it did me no good. Couldn't sleep the first two nights from having horrible cramps. I get cramps randomly through out the day. I've gotten headaches everyday for the past year or so so having to take pills anyways doesn't bother me. I don't plan on getting rid of it but I wouldn't recommend it."