Missed period


So I have three apps for my period and all day I should start my period relatively within the same time frame. My last period was May 1 so I’m only a day late but still. I havent had any discoloration( which I always have right before my period), I haven’t had any spotting either. I took a pregnancy test yesterday but there was nothing. I’ve had bad cramping like my period was gonna start but nothing at all. I’ve also noticed an increase in eggwhite discharge lately. Like a lot of it. Thoughts?