Chemical pregnancy

Well, I feel dumb. I got a few BFPs last week, got too excited too fast, deleted this app and downloaded a pregnancy app. :-/ Now, 6 days late, I just started bleeding, and my test is negative. Do you guys know how Glow deals with chemical pregnancies? I hope it doesn't make its calculations based on last month's cycle length, because 6 of those extra days were "pregnant" days rather than luteal phase days, right? What a bummer.