5 days late but negative test ????

Heather

So I'm 5 days late today for my period which is usually quite on time, yesterday I did a negative test , which was gutting, but to my thinking the last time I had unprotected sex which was on the day of my ovulation was 2 weeks ago, so maybe too early ? I've also been experiencing slight lower cramps and sore boobs. Has anyone else had this ? Xx