Implantation bleeding?

Gabrielle

I’ve been spotting for the past 5 days and my fiancée and i have had sex almost everyday of my fertile window, I’m supposed to start my period tomorrow but I’ve never spotted like this... like ever lol i took a test today and it was negative... so I called my dr and she said if it is implantation bleeding because of pregnancy it wouldn’t show up on a test yet because i am still spotting? What do you guys think??