Advice???

I have long cycles my last period was 11/13/2014 and lasted 5 days. Based on the data I enter I could have ovulated December 14 or December 24. I'm supposed to be getting AF on 1/8/2015 but I've been having spotting/bleeding since December 26 very light pink only when I wipe. Took pregnancy test last night and this morning both BFN. Should I log this as AF or take another test in a couple days, or wait till the 8th to see if AF comes fully?