You haven't explored the options
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Some people just can't remember to take a pill every day. If that sounds like you, think about switching to a "more 'forgettable' method that doesn't rely on taking a pill every day, like a contraceptive implant or an intrauterine device," says Alison Edelman, MD, a clinical gynecologist and associate professor at Oregon Health & Science University in Portland.
You could also consider birth control injections (Depo Provera), a shot in the arm that lasts 3 months, as well as sponges, rings, patches, diaphragms, and more. Check out the variety of choices at Planned Parenthood.
More from Health.com: 12 types of birth control
1)Forgetting to take pills
2)Using the rhythm method
3)Not using lubricants with condoms
4)Incorrect lubricants
Taking about STD or nicking you sponge isnt a common mistake, its plain stupidity.