AF due today! BFN this morning.

I had unprotected intercourse a couple days before my ovulation and 5dpo I have been nauseous, fatigue/tired, and urinating frequently. My breasts also have been really sore especially my nipples. I took a test this morning when I woke up and it was a BFN. I usually get cramps in my legs when I'm supposed to start and usually start in early morning but nothing so far.