Is there still a chance

Emilee

So AF should have started Wednesday and there is still no sign of it. I took a test yesterday afternoon and it was negative, Is there any chance I could be pregnant? How long should I wait to test again if AF still doesn’t come? This is my first month off of birth control so I’ve just been going by the dates the App has given me. Before BC I was always regular but I’m not sure the exact length of my cycle.