Am I pregnant?

Calamity

My last period was Oct 14-17 and I had spotting in the morning of the 28-30 and I have yet to have a period for the month of November. I have taken a pregnancy test every other day since Nov 14 and they have all been negative. I have been on the mini pill since June and had usually had two periods a month until now. Should I go to the doctor and get a blood test? I am now 8 days late for my period.