Pleaseee help!!!!

My af is like clock work, always on time! Af was due Nov.26 still no show today. But, had some weird brown discharge, sometimes dark red blood and sometimes light pink this happened for about 4 days and it really only came when I wiped around 9:30/10:30am(I know, weird). Then nothing allllll day on my panty liner. Yes, I've tested and all 4 were BFN besides this one I'm not sure of, pretty sure it's inconclusive you might have to zoom. ANY OPINIONS on what could be going on would be great :) thanks