If you’re not already taking the pill or using another form of hormonal contraception, you can start taking the progestin only pill at any point during your cycle. Or you can wait until you have your period.
When you’re ready to start using progestin only birth control, pick a convenient time to take it because you’ll have to take it at this time every day.
If you do wait for your period, and you start it within the first five days of your period, you’ll be protected from becoming pregnant right away. So you don’t need to worry about using the diaphragm or condoms.
You might need to use another method of birth control if you have a shorter period. Use condoms or the diaphragm until you’ve used the pill for two days.
You won’t be protected against pregnancy right away if you start taking it at any other point during your cycle. So if you’re not on your period and start taking the progestin only pill, make sure you use extra protection like a condom for the first seven days you take it.