Could i be pregnant?

So my last period was September 29th and ended october 3rd and then i started having brown blood on October 13th and its much lighter and no cramps my period is usually heavy and really bad cramps this one is different ive never had this before and ive been having this for 3 days now i ovulated on the 8th and had sex on the 7th of october. Ive been pregnant before but ive never notice any spotting during that pregnancy. Does anyone know what it coulr be ?

This is brown by the way