17 days late now kinda spotting help!!

GF
Now 17 days late was getting a teeny bit of spotting bit even really worth mentioning even tho I am! Went to the doc today as I had an app and got another neg and got a small gush if kinda pinky brownish discharge doc told me if I don't get a full period by next week to come back for bloods otherwise watch out for spotting and unusual pain and cramps and if I get pains iv never had to go straight to er as it could be ectopic any advice could I be preg or could this be my period I'm never any later that a week hoping to be preg but this bfn have knocked me back