Hello, Freaked Out. Thank you for posting.
We have helped you on this subject before it seems. There is nothing to do but wait. Periods can be late for many reasons such as stress, illness, a change in body chemistry, etc. You had a regular period since the last time you had sex, so you wouldn't be pregnant. If it eases your mind, take a pregnancy test. For the future, use protection to avoid pregnancy if this a concern for you.