Is It Safe To Have Sex While I Am On Contraceptive Pill?

hey, i have been on ovranette contraceptive pill for four months now and the other week i carried on the pill a little bit longer to stop my period when i was on holiday, i took a break when home and had my period, then i took my next pill on monday 17th....that day i went to the doctors and got swapped to cerazztte, i took this pill today on the 18th tuesday....would it be safe to have sex on sunday onwards? without using a condom...i dont know who to ask! thank you x