WArning: this is definitely TMI but I hope you lovely ladies can help!

First cycle off pill (for 12 years off & on) so a bit unfamiliar with my natural CM; day 18 - I mean day 18 since AF started.

I vaguely remember being pretty regular within 28-29 days before pill.

Noticed this afternoon a large amount of CM, completely different to anything else this cycle. It was clear but tinged with pinky-brown, stretchy and in a blob. More inside near soft, high, open cervix. Also outer parts seem ... er... softer. I had a bit of cramping on and off for the last 5 days and thought I may have O'd a few days ago and "all over red rover for cycle" but I am now wondering if I just have... BD last night - could this affect how mucus appears? This arvo's CM is so different to anything else, though...

Haven't charted temps at all.

Would be keen to find out how long I should expect my luteal phase (?) to be so i know when to test...

Thanks darls...