BBT chart help

MacKenzie • 23 • Pansexual🏳️‍🌈 • Layla 08/14/22💕🌈 6/14/18👼🏻 • 5/29/21 🌈👼🏻

This is my first month doing BBT. I haven’t ovulated yet because I haven’t gotten my positive test yet which I haven’t tested this morning yet so we will see. My ovulation date kept getting moved back because I haven’t tested positive yet so I’m looking at other signs. I don’t quite know what the highs and lows mean so I’m not sure what this big drop means. Does it drop right before your peak?