Has this happened to you?

Re

So my period is 6 days late and I've taken two tests around the second and third day late (both negative), but part of me is still worried that they could be false negatives. Usually my cycle only varies by a day or so. I did have a lot of stress recently because my mom passed away last month and I was struggling in school for a minute, so is that more likely the reason? It just seems REALLY late to be just a result of my stress a few weeks ago...