Ovulation... then Late Period!

Hi ladies! I have scoured the internet for the answers, to no avail. So I am here to learn about your experiences!

I have been off hormonal birth control since May and have been tracking my cycles. They’ve been 25 days (expected, since it was cycle 1)— 27—27... and now, I am on day 28 with no period IN SIGHT.

I have been tracking my CM and am usually quite aware of “what’s going on.” I never get cramps or any type of PMS. My cervix before/during my period sits low, and is soft.... After 3 cycles, I thought I had made it through victoriously without any post-pill issues.

Everything seemed fine. I ovulated day 13, same as the past two cycles.

But!... I am on day 2 of Late AF. My cervix is high. I’ve noticed a VERY light brown discharge, mixed with both white and clear when I check for CM— only twice today and yesterday. The rest of the day has mostly been clear with a bit of white. Took a pregnancy test yesterday AFTERNOON (held pee for 4 hours). BFN.

What have your experiences been with late AF’s and discharge so minuscule, you wouldn’t even call it spotting? Do you have any known conditions? Was it just a “weird cycle?” Did you end up pregnant? Thanks!