I need suggestions on the best IUD to get that won't cause crazy mood swings, bleeding, and will last about 5 years. I had my baby 5 months ago, and need to get on birth control asap!!! I've always been skeptical because a friend of mine had hers implant into her uterus and had to be surgically removed. This is also a side note that I'm completely serious about and probably sounds stupid... but my fiancé has a large penis and sometimes will hit my cervix, so could that potentially cause the IUD to implant or move??? Any help is appreciated!! Thank you!!