Period was due yesterday...

I have 27-28 day cycles today is 28 and I haven’t had ANY symptoms whatsoever that af is coming and I know at least 1-2 days before she shows her ugly face. The only thing i am experiencing is some discharge whiteish/yellowish and I keep thinking af is surprise attacking me and I go in the bathroom and nothing just this little discharge on my liner. Has anyone experienced this? I am 15dpo now always wait until 2-3days when af doesn’t show before I test due to having so many negatives in the past 😞 my fingers are crossed this is my month it’s been a long journey. The app bumped my start day to the 23rd since I didn’t start yet but my day was suppose to be the 21st or today at the latest I’ve never gone past 28 day cycle.