birth control
"I got it inserted at age 24 (almost 2 years ago) and it hurt like hell. It is regularly suggested to women who've had children already because they have to slightly open the cervix to insert it, and I have no kids, but it is worth it. It contains no hormones, which means less damage to your body, and the efficacy is about 99.9%. Lasts up to 12 years, or you can have it removed any time before that."