When should I test?

Ka

I wanted to see what y’all thought. I’ve seen everyone say First response early tests are the best but I’ve see some taking the Clearblue digital that shows/estimates how many weeks you are. Which do y’all recommend i am dying to take a test but I don’t want to be too early. I’m just being impatient and wanted to see when others tested.

Glow was telling me my period is suppose to start on the 20th and it moved to the 21st this morning. Anyone had this??? I’ve been logging since Feb. I also set up an other app, Ovia and that’s showing me that I’m suppose to start on the 17th. I’m so confused haha. Just wanted to see what others did, how early I could test and be pretty confident that it is a true reading.