Can anyone help?

I am 12PDO today (AF due on Monday)

On 10DPO I had a very faint positive test with FMU and then 11DPO (yesterday) I had a complete negative test with FMU.

Now today I had had the smallest amount of spotting (brown/creamish in colour), which I've never had before and now it's totally gone 🤔

I didn't test today because I presumed AF was coming. I have been cramping since about 9DPO.

Has anyone had anything similar before and what was the outcome?