Pregnant or just late period!?

Hey everyone! This app predicted I’d ovulate on October 20th. I am ttc and was intimate with my partner for the whole week leading up to and after I ovulated. My periods are always on time and my cycle is as regular as they come lol but I was supposed to start my period yesterday and nothing. I didn’t even have the usual breast tenderness before my period (which has always been a pre period symptom for me). I’ve taken a pregnancy test and it was negative. I have been pregnant twice before and have children but I feel like a test should be positive by now if i am indeed pregnant right? Any advice is appreciated! Thank you !