Condoms are not fool-proof, and sometimes one can break during intercourse. The chance of a condom breaking is highly increased with the use of an oil-based lubricant. If you're using the condom to prevent the transmission of STDs, you'll want to make a doctor's appointment to get tested as soon as possible. If the purpose of the condom was to prevent unwanted pregnancy, you have a few options: Purchase Plan B (levonorgestrel, a progestin) as an over-the-counter medication from your local pharmacy, which is effective up to three days after the condom broke. Have your doctor insert a copper IUD, which not only is 99% effective in preventing the possible current pregnancy, but can also be used for up to 10 years as contraception to prevent any future pregnancies. An IUD is effective for up to five to seven days after the condom broke. Request a prescription for Ella (ulipristal acetate), which is effective up to three days after the condom broke.