If you’re already using birth control, then you’re (sadly) already ahead of much of the pack in terms of avoiding an unwanted pregnancy. But you should still be on the lookout for signs that your birth control isn’t as effective as it could be. Whether it’s because you’ve chosen a method that isn’t optimal for you in some way, because of lack of knowledge, or because of simple user error, you could still end up pregnant — and many birth control users do.