Period Late Negative Test????

Amber

Anybody ever been 4 days late on there cycle but still getting negative pregnancy test? I’m not TTC but I have had unprotected with my boyfriend last month I’m usually never late but I’m wondering if maybe my period is just changing or what I’ve been tracking my cycle on <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> for 7 months now so it’s pretty accurate on when it starts I thought i was going to come on time because last week my boobs were sore as usual before my cycle but no cycle