I am taking ocella

Yes, you are considered protected with just taking the Ocella. However, you are not protected against possible STDs with just the pill, and using a condom along with taking birth control pills will lessen the chances of an unplanned pregnancy even more. If you have already been using two forms of birth control, it would be a good idea to continue doing so.

The pill is not 100 percent effective. So many people use condoms also for more protection.