No af symptoms & no pregnancy symptoms

Soooo my glow app says I should start my period today & my other apps say I should of started my period yesterday. I don’t have any af symptoms. But not any pregnancy symptoms. Except maybe nausea and heartburn . & I ate everything in sight last week . My boobs feel heavier but a little less sore today. I normally have like diarrhea leading up to my period. But yesterday and the day before I had some minor aches in my ovaries but it switches sides. But idk I don’t consider these symptoms because they could be anything.