Light bleeding still going( please respond)

Well i started having light spotting starting mon. It's been light till Friday where after i did some heavy lifting..i notice that the bleeding increased a little and then later that day and night the bleeding stopped so i thought I was done but then this morning i again had light spotting. I read that implantation bleeding usually only last 1-3 days? But I've had this for 6 days now and i dont start my period till oct 30/31?

I'm just wondering what could be happening..i know i need to see a doctor..but any input would be greatly appreciated..thank you