Please help

So a few days before the 3rd I had unprotected sex period was suppose to come on the 3rd an didn't 99% of the time glow is always off two days which means im support to start today here it's 9pm an I Still havent started also a little weird but alotta the time I get horny when I'm on my period an I randomly just get horny...what's wrong? Could I be pregnant? Please help