Charting BBT newbie.

So I just started seriously charting this cycle and I was curious about something. The day before AF showed, my temp was spiked theb dropped over 1 degree. Now every day after AF started, my temp is climbing again. Is this normal for some of you?

Also, I know that when you O, there is going to be a sharp temp drop followed by a spike the next day. Do you O the day your temp falls or when it spikes back up? That's what is confusing me just a bit right now. Haha.

I apologize of my questions are a bit simple. I appreciate any tips you ladies can offer!