Does implantation bleeding smell?...

I have this spotting & it's the last day of what should be my period. af should have started Saturday. I felt symptoms the last 2 wks, bloating.. cramping.. back pain.. nausea.. indigestion. Took a test the next day after I was late (prob too early) & it was negative. but tonight I had this... & it slightly has strong odor. Similar to period but still no af.