Do you have a temp drop before pre period spotting starts?

[ttcno]

This is my first month tracking bbt and today on 8dpo I've had a big drop and I think my pre-AF spotting has started early. I'm thinking this all means my progesterone has dropped really early and can't be a good sign. Would a drop of 0.5 be expected before spotting starts? I expected a drop this big to be before AF unless I'm starting early this month.
So I'm just wondering what other people experience with bbt and spotting?

Hey, most people get the temp drop yes.
some attribute it to implantation however it is seen through pregnant and non pregnant charts. Are you sure this is pre AF spotting and not implant? How long is your normal lutéal phase?

@Duckgirl thank you for replying. My luteal phase is usually 12/13 days but I had a MMC in feb and my cycle hasn't been as regular since things might be a little messed up.

Could be IB if spotting that early. See how it goes over the next few days. BBT should rise afain