1 week delayed but negative pt

Hello! pls help may same case ba dto? 1 week delayed na po ako then i took a test on the 3rd day of missed period and it's negative. Then took again this morning and still negative 😔 regular menstruation and 28 days cycle. Dapat magkakaroon ako nung 1 pero wla pdn til now. May mga sign ndin and symptoms ng pregnancy. Possible parin po ba na buntis?#secondbaby five years gap