When we're holiday we just want to break free from all constraints...and contraception can get forgotten. This can lead to a stressful morning after the night before! And however careful you are, it's no-one's fault if a condom breaks.
Slip some emergency contraception into your suitcase, just to be on the safe side. You can get hold of the morning after pill from pharmacies without a prescription. Note that the morning after pill is only effective when taken within 72 hours of having unprotected sex, and it doesn't protect you against STDs. And don't forget to use a condom until the end of your cycle.