Confused

Glow said I was supposed to start af today and nothing... I woke up sometime in the middle of the night pee in a lil cup put aside for the morning so I can test.I was tooooo tired to do it right then and their. FINALLY in the a.m I took the test BFN you ladies THINK the test would still be valid? Or should I just need to wait a few days and re test ... usually my period is spot on ...