Period is late

Ivy • Mama of 2💙

So my period is 2 days late, I’m having no symptoms asides heart burn and sore boobs BUT isn’t that also premenstrual symptoms too? Normally my period isn’t late but it’s going on 3 days now and I did test yesterday and it was negative so I’m confused why it’s late u less I tested too early? Also I tested at night but I already had a missed period so if I was pregnant wouldn’t it of been positive regardless of time of day?