Advice please... stopping birth control; impact to cycle

Stopped taking birth control before my last period. We then started ttc. I didn’t even know about tracking ovulation so didn’t do that but we did BD a lot. While on birth control my cycle was 28-30 days. Glow said my period was supposed to start yesterday 8/29 but it hasn’t yet. I did something to the calendar and now it’s pushed out. Please note I didn’t track ovulation so I would ignore that piece. I didn’t even realize tracking that was a thing! But next month I will definitely track. Long story, still kind of long, is there a chance I could maybe still be pregnant? I took a test this morning and it was negative. If my period isn’t actually supposed to come until next week, could there be a chance?