No, you do not need to use additional protection during your 7-day pill-free interval, provided you have taken all 21 active tablets of your combined oral contraceptive (containing drospirenone and ethinyl estradiol) correctly and on time. You remain fully protected against pregnancy during this break, as well as during your withdrawal bleed. The key to maintaining this continuous protection is to ensure you start your next 21-day pack exactly on time after the 7-day break. If you missed any pills in the previous pack or start the new pack late, only then would you need backup protection like condoms.