No period...

Edlyn • Feeling peachy!
GM my Glow family. So, i have an appointment with my gyn saturday and 2 period trackers it says Im 5 days late. I tested and nothing negative ;( . I got my period last month on the 1st and my cycle run between 28-30 days. I think the trackers are wrong.  Should I just wait for ny appointment or retest on friday if no period? 
Ps. There are no symptoms!