I don't know, I don't take birth control and haven't for years, but a co-worker of mine said she gets birth control in the form of a shot, which she gets every 3 months. She seems to be happy with it. I am thinking it's the Depo-Provera shot. Have you tried it? This may be something you want to speak to your doctor about, and explore. It may work for you, because you wouldn't feel it and it would not have any impact on sex or cause pain in your body. I have read about people whose tissue grew around the IUD, got very ill and required emergency surgery, not sure if you had something like that happening with you, but it sounds scary, so if you plan to try another IUD, make sure you ask questions about such risks with your doctor, prior to implanting it. Other than that, maybe you want to consider asking your boyfriend to use condoms, or if you're not planning to have kids, he can get a vasectomy or you can get your tubes tied.