Need opinions PLS

Today is suppose to be the 3 day of my cycle but still no sign of it showing.. I've felt no cramping no bloating no nothing as I would usually feel when I noe my cycle is fixing to start.. haven't been late like this since I found out I was pregnant with my daughter.. I took a $1 home pregnancy test but it read negative.. I need feedback and others thoughts to What may be going on? anyone please.