How long should I use an additional form of pregnancy protection when taking Vibin and Clindamycin-Mip?

Hello, because of the removal of the eight I got the antibiotic clindacymin. I take Vibin contraceptive pills and my gynecologist said that you need to protect yourself additionally for the entire time of taking the antibiotic and 7 days after finishing the treatment. In the leaflet, however, I found information that after taking over drugs that reduce the effectiveness, you need to protect yourself for an additional 28 days. There was no specific wedge mentioned but another antibiotic. How much should I protect myself additionally?