No AF and negative tests

Katie
AF was supposed to arrive anywhere from Wednesday to Friday this week. It is now Saturday and still haven't seen her. 
I did have spotting on the morning of Wednesday, which was 10 DPO for me. Just in the morning, one wipe. Thought that was period. 
I have taken three tests from Wednesday to Thursday evening and they've all been negative. 
I feel very confused. 
I'm going to take another one this morning with my FMU. 
Really just looking for advice. I know my cycle pretty well and for the first time I just feel confused. 
Thanks Glow community for any words.