[Lelola]

Many things can cause your period to be late and if it is irregular like you say, then it can be hard to pinpoint when it will actually be due. I would give it another week and then consider shopping for a pregnancy test. Look at what day the test recommends you test. Follow the instructions closely for the most accurate results. Testing too early may give a false negative.

The symptoms you're describing are more likely stress.

I would also consider asking to be tested for STIs due to the unprotected sex. Even if the guy promised he was clean, it is important to be tested as untreated STIs can lead to infertility.