For ladies who have ever had IB, what was it like?

Sq
I'm currently 10dpo (AF due in 5 days according to Glow). Never in my 33yrs of life have I ever spotted before AF. I just went to the restroom though, and noticed a little bit of brown spotting in my undies. I'm sorry if this is TMI, but one spot was about as big as the head of a q-tip, the other, half that size. When I wiped though, there was nothing there... Strange, as I was honestly thinking maybe AF was just coming to crash my party early, even though AF doesn't start like this for me (she always comes, guns blazing!). So my question is: Can IB be as little as this??? Also, I was always under the impression IB happened a little earlier in the TWW. Surely 10dpo is too late for this, right??? So I'm just curious... Of the ladies that have experienced IB before, what was it like, and around what dpo were you when it happened? Thanks for reading!😀