I had my IUD for a year and a half until I accidentally yanked it out with my cup (Lunette Selene) the other day (well, I didn't feel it but it was in the cup when I took it out). Of course I hadn't used the cup with the IUD before last month because of this very fear. I bleed a lot and with the Paragard it was even worse so I suddenly thought the cup would be a great idea. Not. I'm very disappointed and feel ashamed. I'm planning on getting a Mirena this time so my periods will hopefully get lighter so I won't have to worry. I am so angry with myself.