So the morning-after pill, or the Plan B, is a progesterone only form of preventing pregnancy. This method of preventing pregnancy is designed to be used only after you've had an accident. In other words, if you've had a contraceptive failure with birth control pills, or the ring, or the shot, or you've had a condom failure, this is an excellent way to prevent pregnancy in the short term. It is very effective if you use it within the first 12 hours. If you are a strict condom user, you should keep the morning-after pill on hand at all times, just in case you have a contraceptive failure.
This does not mean you should use this form of pregnancy prevention as a form of birth control. They are two very different modes of preventing pregnancy. If you are sexually active on a regular basis, even if you are intermittently sexually active, meaning that you have sex here and there, once a week, once a month, you should probably use a reliable form of birth control.
Condoms are an excellent form of birth control if you are having sex intermittently. If you are having sex regularly, condoms work, but if you need something more reliable and more consistent, you need to speak to a nurse practitioner or a physician about the birth control options that are best for you. You should not be using the morning-after pill as a form of birth control. You should not be using the morning-after pill as a form of birth control. It is not a good idea to be taking hormones periodically to prevent pregnancy. It is not the most effective form of birth control by any means, and it will make your periods unpredictable and irregular.
There's a big difference between preventing pregnancy and using birth control. Plan B, or the morning-after pill, is a way of preventing pregnancy if you are already using a reliable, consistent form of birth control. Plan B, or the morning-after pill, is not a form of birth control. It is not reliable and consistent as the forms of birth control that you can get from your doctor or nurse practitioner, or by using condoms on a consistent basis.
So please don't confuse the two. Understand that if you are sexually active and you need birth control, either use condoms or follow up with a doctor or nurse practitioner to get the birth control option that's best for you.