First time doing BBT

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

This is my first time doing BBT while TTC. Is it okay for it to drop that much right before your window starts?