What do you think ? I’m confused. Help please!

This is my first month TTC for my 3rd.

*sorry if this is all over the place*

*** I was on the pill for about 2 years and stopped taking them when my period started on Aug. 23. Posting screenshot of my log. (I did not log every time we had sex). ***

My period is now two days late and I took a test this morning and it was a BFN. I’m not feeling great today but I’m not having any normal PMS. My period has never been late.

With my first, I didn’t bleed at all.

With my second I was bleeding for a week and went to the dr, found out I was pregnant.

Yesterday I had a small amount of cm with a brown color like old blood but it was a very small amount.

Basically I’m wondering if you think I could possibly be pregnant? Or is this something else ?