Protected intercourse, my period is at least 5 days late

If you are positive he did not come inside of you, nor did any come leak  into your vagina, it is highly unlikely that you are pregnant. If your boyfriend has an STI, that could be the cause, but if he does not then we can rule that out as well. It is common for a woman to occasionally miss a period or get a late one, so you don't need to worry. However, if it still has not come in about a week, you may want to give your doctor a call. He or she will know what to do.

I can assure you, lots of girls freak out when their period comes late, and almost always it means nothing. Your body is slightly behind on its schedule, but it'll catch up to the calendar. You'll be fine!

Let me know what your outcome is :)