6 days late, negative tests?

I'm six days late, took two tests this morning and still negative. I'm not stressed out or any life changes that would make it late. Haven't been hungry, been sick with a flu like thing, boobs are killing me, waking up randomly during the night to pee and peeing a lot in the day time. I feel off all around. Any advice? Anyone not get a bfp for a while after missing their period? ❤