Ladies, PLEASE HELP! This app is confusing me!

First and foremost, Happy Easter! He is risen!! 🙌🏽🙌🏽
Secondly, I am SO confused about glow. Glow Veterans PLEASE respond! Previously, my fertile window was marked as March 6-12 with AF scheduled to start Yesterday. 
BUT THEN, my calendar shifted on me! NOW it says that my fertile window was March 13-19 with AF starting April 1st. 
Without that knowledge, I feel like I did not optimize my BD!!! Also, have I been testing entirely too early?! What do you all make of it???