I need advice!

I was supposed to start my period last Friday. Never did and have been taking pregnancy tests and they are all negative. HOWEVER, today I wiped and had the smallest spotting of pinkish blood. Because I’m technically 7 days late could I still be pregnant?! Today is cycle day 36 for me and I am usually a steady 28-29 day cycle. The 12th, 14th, 19th & 20th was the last time we bd after what I thought was ovulation. Please help! I’m so confused 😐