Confused about bbt change

[Bubblezak]

Its my first month ttc and bbt charting. But my bbt dropped at 5dpo and then again at 6dpo and its flat till now. Any ideas what it could mean?

 

[Bubblezak]

This is my chart any help would be appreciated.

 

[clynn393]

Looks normal to me! Mine's zig zaggy but it's still above the coverline.

 

[28329]

Looks fine. It is still well above the coverline.