When to test?

Hi! My husband and I are trying, but this is all new to me. According to GLOW I am 3 days late. How accurate has it been for you? I tested with an amazon test strip my first day and second day and I didn’t see a line. Am I doing it wrong? I need tips.

Do I continue to test with those or should

I go buy a different kind? I’m scared once I buy one I’ll start

Update: I tested today which would be four days late which isn’t normal for me. Do you see a line? I’m so excited and nervous to believe it. Lol